Revision: 5297
http://ipcop.svn.sourceforge.net/ipcop/?rev=5297&view=rev
Author: owes
Date: 2011-01-04 14:15:47 +0000 (Tue, 04 Jan 2011)
Log Message:
-----------
Add ledtrig-netdev kernel module.
>From OpenWRT, proposed upstream.
Modified Paths:
--------------
ipcop/trunk/config/kernel/kernel.config.i486
ipcop/trunk/lfs/linux
Added Paths:
-----------
ipcop/trunk/src/patches/linux-2.6.32_ledtrig-netdev.patch
Modified: ipcop/trunk/config/kernel/kernel.config.i486
===================================================================
--- ipcop/trunk/config/kernel/kernel.config.i486 2011-01-04 12:42:39 UTC
(rev 5296)
+++ ipcop/trunk/config/kernel/kernel.config.i486 2011-01-04 14:15:47 UTC
(rev 5297)
@@ -2372,6 +2372,7 @@
CONFIG_LEDS_TRIGGERS=y
CONFIG_LEDS_TRIGGER_TIMER=m
CONFIG_LEDS_TRIGGER_IDE_DISK=y
+CONFIG_LEDS_TRIGGER_NETDEV=m
CONFIG_LEDS_TRIGGER_HEARTBEAT=m
CONFIG_LEDS_TRIGGER_BACKLIGHT=m
CONFIG_LEDS_TRIGGER_DEFAULT_ON=m
Modified: ipcop/trunk/lfs/linux
===================================================================
--- ipcop/trunk/lfs/linux 2011-01-04 12:42:39 UTC (rev 5296)
+++ ipcop/trunk/lfs/linux 2011-01-04 14:15:47 UTC (rev 5297)
@@ -105,6 +105,9 @@
# ATM Header fix
cd $(DIR_APP) && patch -Np1 -i
$(DIR_PATCHES)/$(THISAPP)_atm-headers.patch
+ # LED Netdev Trigger
+ cd $(DIR_APP) && patch -Np1 -i
$(DIR_PATCHES)/$(THISAPP)_ledtrig-netdev.patch
+
# Grsecurity -currently disabled as we need to setup PaX
#cd $(DIR_APP) && gzip -dc
$(DIR_DL)/grsecurity-2.1.10-2.6.19.2-200701222307.patch.gz | patch -Np1
#cd $(DIR_APP) && sed -i "s/\-grsec//" Makefile
Added: ipcop/trunk/src/patches/linux-2.6.32_ledtrig-netdev.patch
===================================================================
--- ipcop/trunk/src/patches/linux-2.6.32_ledtrig-netdev.patch
(rev 0)
+++ ipcop/trunk/src/patches/linux-2.6.32_ledtrig-netdev.patch 2011-01-04
14:15:47 UTC (rev 5297)
@@ -0,0 +1,609 @@
+From OpenWRT, proposed upstream
http://marc.info/?l=linux-kernel&m=129099808322799&w=2
+2 minor modifications for 2.6.32 to fix use of 32/64 bit stat counters, search
for: KERNEL_VERSION(2,6,36)
+
+=====
+
+Changes in v2:
+- Use individual entries for link, transmit, and receive;
+ each can be "enabled" or "disabled"
+- Use strict_strtoul instead of simple_strtoul
+- Add descriptions to Documentation/ABI/testing/sysfs-class-led
+
+ Documentation/ABI/testing/sysfs-class-led | 64 ++++
+ drivers/leds/Kconfig | 7 +
+ drivers/leds/Makefile | 1 +
+ drivers/leds/ledtrig-netdev.c | 475 +++++++++++++++++++++++++++++
+ 4 files changed, 547 insertions(+), 0 deletions(-)
+ create mode 100644 drivers/leds/ledtrig-netdev.c
+
+diff --git a/Documentation/ABI/testing/sysfs-class-led
b/Documentation/ABI/testing/sysfs-class-led
+index 9e4541d..0b03863 100644
+--- a/Documentation/ABI/testing/sysfs-class-led
++++ b/Documentation/ABI/testing/sysfs-class-led
+@@ -26,3 +26,67 @@ Description:
+ scheduler is chosen. Trigger specific parameters can appear in
+ /sys/class/leds/<led> once a given trigger is selected.
+
++What: /sys/class/leds/<led>/device_name
++Date: November 2010
++KernelVersion: 2.6.37
++Contact: Eric Cooper <e...@cmu.edu>
++Description:
++ Network device name to monitor when trigger is set to "netdev".
++
++What: /sys/class/leds/<led>/interval
++Date: November 2010
++KernelVersion: 2.6.37
++Contact: Eric Cooper <e...@cmu.edu>
++Description:
++ Duration of LED blink in milliseconds when trigger is set to
++ "netdev".
++
++What: /sys/class/leds/<led>/link
++Date: November 2010
++KernelVersion: 2.6.37
++Contact: Eric Cooper <e...@cmu.edu>
++Description:
++ When trigger is set to "netdev", this value is either "enabled"
++ or "disabled". If enabled, this LED's normal state reflects
++ whether or not the link for the corresponding network device
++ is up (has carrier).
++
++What: /sys/class/leds/<led>/transmit
++Date: November 2010
++KernelVersion: 2.6.37
++Contact: Eric Cooper <e...@cmu.edu>
++Description:
++ When trigger is set to "netdev", this value is either "enabled"
++ or "disabled". If enabled, this LED blinks when data is
++ transmitted on the corresponding network device.
++
++What: /sys/class/leds/<led>/receive
++Date: November 2010
++KernelVersion: 2.6.37
++Contact: Eric Cooper <e...@cmu.edu>
++Description:
++ When trigger is set to "netdev", this value is either "enabled"
++ or "disabled". If enabled, this LED blinks when data is
++ received on the corresponding network device.
++
++ Example configurations:
++
++ Simple link status LED:
++ # echo netdev >someled/trigger
++ # echo eth0 >someled/device_name
++ # echo enabled >someled/link
++
++ Ethernet-style link/activity LED:
++ # echo netdev >someled/trigger
++ # echo eth0 >someled/device_name
++ # echo enabled >someled/link
++ # echo enabled >someled/transmit
++ # echo enabled >someled/receive
++
++ Modem-style tx/rx LEDs:
++ # echo netdev >led1/trigger
++ # echo ppp0 >led1/device_name
++ # echo enabled >led1/transmit
++ # echo netdev >led2/trigger
++ # echo ppp0 >led2/device_name
++ # echo enabled >led2/receive
+diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
+index 77b8fd2..8d81cd0 100644
+--- a/drivers/leds/Kconfig
++++ b/drivers/leds/Kconfig
+@@ -374,6 +374,13 @@ config LEDS_TRIGGER_HEARTBEAT
+ load average.
+ If unsure, say Y.
+
++config LEDS_TRIGGER_NETDEV
++ tristate "LED Network Device Trigger"
++ depends on NET
++ help
++ This allows LEDs to be controlled by network device activity.
++ If unsure, say Y.
++
+ config LEDS_TRIGGER_BACKLIGHT
+ tristate "LED backlight Trigger"
+ help
+diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
+index aae6989..a3bb67d 100644
+--- a/drivers/leds/Makefile
++++ b/drivers/leds/Makefile
+@@ -49,6 +49,7 @@ obj-$(CONFIG_LEDS_DAC124S085) +=
leds-dac124s085.o
+ obj-$(CONFIG_LEDS_TRIGGER_TIMER) += ledtrig-timer.o
+ obj-$(CONFIG_LEDS_TRIGGER_IDE_DISK) += ledtrig-ide-disk.o
+ obj-$(CONFIG_LEDS_TRIGGER_HEARTBEAT) += ledtrig-heartbeat.o
++obj-$(CONFIG_LEDS_TRIGGER_NETDEV) += ledtrig-netdev.o
+ obj-$(CONFIG_LEDS_TRIGGER_BACKLIGHT) += ledtrig-backlight.o
+ obj-$(CONFIG_LEDS_TRIGGER_GPIO) += ledtrig-gpio.o
+ obj-$(CONFIG_LEDS_TRIGGER_DEFAULT_ON) += ledtrig-default-on.o
+diff --git a/drivers/leds/ledtrig-netdev.c b/drivers/leds/ledtrig-netdev.c
+new file mode 100644
+index 0000000..eeb5ac8
+--- /dev/null
++++ b/drivers/leds/ledtrig-netdev.c
+@@ -0,0 +1,483 @@
++/*
++ * LED Kernel Netdev Trigger
++ *
++ * Toggles the LED to reflect the link and traffic state of a named net device
++ *
++ * Copyright 2007 Oliver Jowett <oli...@opencloud.com>
++ *
++ * Derived from ledtrig-timer.c which is:
++ * Copyright 2005-2006 Openedhand Ltd.
++ * Author: Richard Purdie <rpur...@openedhand.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ *
++ */
++
++#include <linux/module.h>
++#include <linux/jiffies.h>
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/list.h>
++#include <linux/spinlock.h>
++#include <linux/device.h>
++#include <linux/sysdev.h>
++#include <linux/netdevice.h>
++#include <linux/timer.h>
++#include <linux/ctype.h>
++#include <linux/leds.h>
++#include <linux/version.h>
++#include <net/net_namespace.h>
++
++#include "leds.h"
++
++/*
++ * Configurable sysfs attributes:
++ *
++ * device_name - network device name to monitor
++ *
++ * interval - duration of LED blink, in milliseconds
++ *
++ * Each of the following attributes may be "enabled" or "disabled":
++ *
++ * link - if enabled, the LED's normal state reflects
++ * whether the link is up (has carrier)
++ * transmit - if enabled, the LED blinks on transmitted data
++ * receive - if enabled, the LED blinks on received data
++ *
++ * Some suggestions:
++ *
++ * Simple link status LED:
++ * $ echo netdev >someled/trigger
++ * $ echo eth0 >someled/device_name
++ * $ echo enabled >someled/link
++ *
++ * Ethernet-style link/activity LED:
++ * $ echo netdev >someled/trigger
++ * $ echo eth0 >someled/device_name
++ * $ echo enabled >someled/link
++ * $ echo enabled >someled/transmit
++ * $ echo enabled >someled/receive
++ *
++ * Modem-style tx/rx LEDs:
++ * $ echo netdev >led1/trigger
++ * $ echo ppp0 >led1/device_name
++ * $ echo enabled >led1/transmit
++ * $ echo netdev >led2/trigger
++ * $ echo ppp0 >led2/device_name
++ * $ echo enabled >led2/receive
++ */
++
++#define MODE_LINK 1
++#define MODE_TX 2
++#define MODE_RX 4
++
++struct led_netdev_data {
++ rwlock_t lock;
++
++ struct timer_list timer;
++ struct notifier_block notifier;
++
++ struct led_classdev *led_cdev;
++ struct net_device *net_dev;
++
++ char device_name[IFNAMSIZ];
++ unsigned interval;
++ unsigned mode;
++ unsigned link_up;
++ unsigned last_activity;
++};
++
++static void set_baseline_state(struct led_netdev_data *trigger_data)
++{
++ if ((trigger_data->mode & MODE_LINK) != 0 && trigger_data->link_up)
++ led_set_brightness(trigger_data->led_cdev, LED_FULL);
++ else
++ led_set_brightness(trigger_data->led_cdev, LED_OFF);
++
++ if ((trigger_data->mode & (MODE_TX | MODE_RX)) != 0 &&
++ trigger_data->link_up)
++ mod_timer(&trigger_data->timer,
++ jiffies + trigger_data->interval);
++ else
++ del_timer(&trigger_data->timer);
++}
++
++static ssize_t led_device_name_show(struct device *dev,
++ struct device_attribute *attr, char *buf)
++{
++ struct led_classdev *led_cdev = dev_get_drvdata(dev);
++ struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++
++ read_lock(&trigger_data->lock);
++ sprintf(buf, "%s\n", trigger_data->device_name);
++ read_unlock(&trigger_data->lock);
++
++ return strlen(buf) + 1;
++}
++
++static ssize_t led_device_name_store(struct device *dev,
++ struct device_attribute *attr,
++ const char *buf, size_t size)
++{
++ struct led_classdev *led_cdev = dev_get_drvdata(dev);
++ struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++
++ if (size < 0 || size >= IFNAMSIZ)
++ return -EINVAL;
++
++ write_lock(&trigger_data->lock);
++
++ strcpy(trigger_data->device_name, buf);
++ if (size > 0 && trigger_data->device_name[size-1] == '\n')
++ trigger_data->device_name[size-1] = 0;
++
++ if (trigger_data->device_name[0] != 0) {
++ /* check for existing device to update from */
++ struct net_device *dev =
++ dev_get_by_name(&init_net, trigger_data->device_name);
++ if (dev != NULL) {
++ unsigned int flags = dev_get_flags(dev);
++ trigger_data->net_dev = dev;
++ trigger_data->link_up = (flags & IFF_LOWER_UP) != 0;
++ }
++ /* updates LEDs, may start timers */
++ set_baseline_state(trigger_data);
++ }
++
++ write_unlock(&trigger_data->lock);
++ return size;
++}
++
++static DEVICE_ATTR(device_name, 0644,
++ led_device_name_show, led_device_name_store);
++
++static const char enabled[] = "enabled";
++static const char disabled[] = "disabled";
++
++static ssize_t led_show_mode(struct device *dev,
++ struct device_attribute *attr, char *buf,
++ unsigned mode_bit)
++{
++ struct led_classdev *led_cdev = dev_get_drvdata(dev);
++ struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++
++ return sprintf(buf, "%s\n", (trigger_data->mode & mode_bit) ?
++ enabled : disabled);
++}
++
++static void led_mode_set(struct led_netdev_data *data, unsigned bit)
++{
++ write_lock(&data->lock);
++ data->mode |= bit;
++ set_baseline_state(data);
++ write_unlock(&data->lock);
++}
++
++static void led_mode_clear(struct led_netdev_data *data, unsigned bit)
++{
++ write_lock(&data->lock);
++ data->mode &= ~bit;
++ set_baseline_state(data);
++ write_unlock(&data->lock);
++}
++
++static ssize_t led_store_mode(struct device *dev,
++ struct device_attribute *attr, const char *buf,
++ size_t size, unsigned mode_bit)
++{
++ struct led_classdev *led_cdev = dev_get_drvdata(dev);
++ struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++ char *cp;
++ int len = size;
++
++ cp = memchr(buf, '\n', size);
++ if (cp)
++ len = cp - buf;
++ if (len == sizeof(enabled) - 1 && strncmp(buf, enabled, len) == 0)
++ led_mode_set(trigger_data, mode_bit);
++ else if (len == sizeof(disabled) - 1 &&
++ strncmp(buf, disabled, len) == 0)
++ led_mode_clear(trigger_data, mode_bit);
++ else
++ return -EINVAL;
++ return size;
++}
++
++#define LED_NETDEV_ATTR(name, mode_bit)
\
++static ssize_t led_show_##name(struct device *dev, \
++ struct device_attribute *attr, \
++ char *buf) \
++{ \
++ return led_show_mode(dev, attr, buf, mode_bit); \
++} \
++ \
++static ssize_t led_store_##name(struct device *dev, \
++ struct device_attribute *attr, \
++ const char *buf, size_t size) \
++{ \
++ return led_store_mode(dev, attr, buf, size, mode_bit); \
++} \
++ \
++static DEVICE_ATTR(name, 0644, led_show_##name, led_store_##name)
++
++LED_NETDEV_ATTR(link, MODE_LINK);
++LED_NETDEV_ATTR(transmit, MODE_TX);
++LED_NETDEV_ATTR(receive, MODE_RX);
++
++static ssize_t led_interval_show(struct device *dev,
++ struct device_attribute *attr,
++ char *buf)
++{
++ struct led_classdev *led_cdev = dev_get_drvdata(dev);
++ struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++
++ read_lock(&trigger_data->lock);
++ sprintf(buf, "%u\n", jiffies_to_msecs(trigger_data->interval));
++ read_unlock(&trigger_data->lock);
++
++ return strlen(buf) + 1;
++}
++
++static ssize_t led_interval_store(struct device *dev,
++ struct device_attribute *attr,
++ const char *buf, size_t size)
++{
++ struct led_classdev *led_cdev = dev_get_drvdata(dev);
++ struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++ unsigned long value;
++ int ret;
++
++ ret = strict_strtoul(buf, 10, &value);
++ if (ret < 0)
++ return ret;
++
++ /* impose some basic bounds on the timer interval */
++ if (value >= 5 && value <= 10000) {
++ write_lock(&trigger_data->lock);
++ trigger_data->interval = msecs_to_jiffies(value);
++ set_baseline_state(trigger_data); /* resets timer */
++ write_unlock(&trigger_data->lock);
++ return size;
++ } else {
++ return -EINVAL;
++ }
++}
++
++static DEVICE_ATTR(interval, 0644, led_interval_show, led_interval_store);
++
++static int netdev_trig_notify(struct notifier_block *nb,
++ unsigned long evt,
++ void *dv)
++{
++ struct net_device *dev = dv;
++ struct led_netdev_data *trigger_data =
++ container_of(nb, struct led_netdev_data, notifier);
++
++ if (evt != NETDEV_UP && evt != NETDEV_DOWN && evt != NETDEV_CHANGE &&
++ evt != NETDEV_REGISTER && evt != NETDEV_UNREGISTER)
++ return NOTIFY_DONE;
++
++ write_lock(&trigger_data->lock);
++
++ if (strcmp(dev->name, trigger_data->device_name))
++ goto done;
++
++ if (evt == NETDEV_REGISTER) {
++ if (trigger_data->net_dev != NULL)
++ dev_put(trigger_data->net_dev);
++ dev_hold(dev);
++ trigger_data->net_dev = dev;
++ trigger_data->link_up = 0;
++ goto done;
++ }
++
++ if (evt == NETDEV_UNREGISTER && trigger_data->net_dev != NULL) {
++ dev_put(trigger_data->net_dev);
++ trigger_data->net_dev = NULL;
++ goto done;
++ }
++
++ /* UP / DOWN / CHANGE */
++
++ trigger_data->link_up = (evt != NETDEV_DOWN && netif_carrier_ok(dev));
++ set_baseline_state(trigger_data);
++
++done:
++ write_unlock(&trigger_data->lock);
++ return NOTIFY_DONE;
++}
++
++/* here's the real work! */
++static void netdev_trig_timer(unsigned long arg)
++{
++ struct led_netdev_data *trigger_data = (struct led_netdev_data *)arg;
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
++ struct rtnl_link_stats64 temp;
++ const struct rtnl_link_stats64 *dev_stats;
++#else
++ const struct net_device_stats *dev_stats;
++#endif
++ unsigned new_activity;
++
++ write_lock(&trigger_data->lock);
++
++ if (!trigger_data->link_up || !trigger_data->net_dev ||
++ (trigger_data->mode & (MODE_TX | MODE_RX)) == 0) {
++ /* we don't need to do timer work, just reflect link state. */
++ int on = (trigger_data->mode & MODE_LINK) != 0 &&
++ trigger_data->link_up;
++ led_set_brightness(trigger_data->led_cdev,
++ on ? LED_FULL : LED_OFF);
++ goto no_restart;
++ }
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
++ dev_stats = dev_get_stats(trigger_data->net_dev, &temp);
++#else
++ dev_stats = dev_get_stats(trigger_data->net_dev);
++#endif
++
++ new_activity =
++ ((trigger_data->mode & MODE_TX) ? dev_stats->tx_packets : 0) +
++ ((trigger_data->mode & MODE_RX) ? dev_stats->rx_packets : 0);
++
++ if (trigger_data->mode & MODE_LINK) {
++ /* base state is ON (link present) */
++ /* if there's no link, we don't get this far
++ and the LED is off */
++
++ /* OFF -> ON always */
++ /* ON -> OFF on activity */
++ if (trigger_data->led_cdev->brightness == LED_OFF)
++ led_set_brightness(trigger_data->led_cdev, LED_FULL);
++ else if (trigger_data->last_activity != new_activity)
++ led_set_brightness(trigger_data->led_cdev, LED_OFF);
++ } else {
++ /* base state is OFF */
++ /* ON -> OFF always */
++ /* OFF -> ON on activity */
++ if (trigger_data->led_cdev->brightness == LED_FULL)
++ led_set_brightness(trigger_data->led_cdev, LED_OFF);
++ else if (trigger_data->last_activity != new_activity)
++ led_set_brightness(trigger_data->led_cdev, LED_FULL);
++ }
++
++ trigger_data->last_activity = new_activity;
++ mod_timer(&trigger_data->timer, jiffies + trigger_data->interval);
++
++no_restart:
++ write_unlock(&trigger_data->lock);
++}
++
++static void netdev_trig_activate(struct led_classdev *led_cdev)
++{
++ struct led_netdev_data *trigger_data;
++ int rc;
++
++ trigger_data = kzalloc(sizeof(struct led_netdev_data), GFP_KERNEL);
++ if (!trigger_data)
++ return;
++
++ rwlock_init(&trigger_data->lock);
++
++ trigger_data->notifier.notifier_call = netdev_trig_notify;
++ trigger_data->notifier.priority = 10;
++
++ setup_timer(&trigger_data->timer, netdev_trig_timer,
++ (unsigned long) trigger_data);
++
++ trigger_data->led_cdev = led_cdev;
++ trigger_data->net_dev = NULL;
++ trigger_data->device_name[0] = 0;
++
++ trigger_data->mode = 0;
++ trigger_data->interval = msecs_to_jiffies(50);
++ trigger_data->link_up = 0;
++ trigger_data->last_activity = 0;
++
++ led_cdev->trigger_data = trigger_data;
++
++ rc = device_create_file(led_cdev->dev, &dev_attr_device_name);
++ if (rc)
++ goto err_out;
++ rc = device_create_file(led_cdev->dev, &dev_attr_link);
++ if (rc)
++ goto err_out_device_name;
++ rc = device_create_file(led_cdev->dev, &dev_attr_transmit);
++ if (rc)
++ goto err_out_link;
++ rc = device_create_file(led_cdev->dev, &dev_attr_receive);
++ if (rc)
++ goto err_out_transmit;
++ rc = device_create_file(led_cdev->dev, &dev_attr_interval);
++ if (rc)
++ goto err_out_receive;
++
++ register_netdevice_notifier(&trigger_data->notifier);
++ return;
++
++err_out_receive:
++ device_remove_file(led_cdev->dev, &dev_attr_receive);
++err_out_transmit:
++ device_remove_file(led_cdev->dev, &dev_attr_transmit);
++err_out_link:
++ device_remove_file(led_cdev->dev, &dev_attr_link);
++err_out_device_name:
++ device_remove_file(led_cdev->dev, &dev_attr_device_name);
++err_out:
++ led_cdev->trigger_data = NULL;
++ kfree(trigger_data);
++}
++
++static void netdev_trig_deactivate(struct led_classdev *led_cdev)
++{
++ struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++
++ if (trigger_data) {
++ unregister_netdevice_notifier(&trigger_data->notifier);
++
++ device_remove_file(led_cdev->dev, &dev_attr_device_name);
++ device_remove_file(led_cdev->dev, &dev_attr_link);
++ device_remove_file(led_cdev->dev, &dev_attr_transmit);
++ device_remove_file(led_cdev->dev, &dev_attr_receive);
++ device_remove_file(led_cdev->dev, &dev_attr_interval);
++
++ write_lock(&trigger_data->lock);
++
++ if (trigger_data->net_dev) {
++ dev_put(trigger_data->net_dev);
++ trigger_data->net_dev = NULL;
++ }
++
++ write_unlock(&trigger_data->lock);
++
++ del_timer_sync(&trigger_data->timer);
++
++ kfree(trigger_data);
++ }
++}
++
++static struct led_trigger netdev_led_trigger = {
++ .name = "netdev",
++ .activate = netdev_trig_activate,
++ .deactivate = netdev_trig_deactivate,
++};
++
++static int __init netdev_trig_init(void)
++{
++ return led_trigger_register(&netdev_led_trigger);
++}
++
++static void __exit netdev_trig_exit(void)
++{
++ led_trigger_unregister(&netdev_led_trigger);
++}
++
++module_init(netdev_trig_init);
++module_exit(netdev_trig_exit);
++
++MODULE_AUTHOR("Oliver Jowett <oli...@opencloud.com>");
++MODULE_DESCRIPTION("Netdev LED trigger");
++MODULE_LICENSE("GPL");
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