--- /dev/null
+Add a netdev LED trigger for all Blinkenlights lovers...
+Originally taken from https://dev.openwrt.org/ticket/2776
+Slightly updated for 2.6.24 by Mickey <mickey@openmoko.org>.
+
+Index: git/drivers/leds/ledtrig-netdev.c
+===================================================================
+--- /dev/null
++++ git/drivers/leds/ledtrig-netdev.c
+@@ -0,0 +1,438 @@
++/*
++ * LED Kernel Netdev Trigger
++ *
++ * Toggles the LED to reflect the link and traffic state of a named net device
++ *
++ * Copyright 2007 Oliver Jowett <oliver@opencloud.com>
++ *
++ * Derived from ledtrig-timer.c which is:
++ * Copyright 2005-2006 Openedhand Ltd.
++ * Author: Richard Purdie <rpurdie@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 "leds.h"
++
++/*
++ * Configurable sysfs attributes:
++ *
++ * device_name - network device name to monitor
++ *
++ * interval - duration of LED blink, in milliseconds
++ *
++ * mode - either "none" (LED is off) or a space separated list of one or more of:
++ * link: LED's normal state reflects whether the link is up (has carrier) or not
++ * tx: LED blinks on transmitted data
++ * rx: LED blinks on receive data
++ *
++ * Some suggestions:
++ *
++ * Simple link status LED:
++ * $ echo netdev >someled/trigger
++ * $ echo eth0 >someled/device_name
++ * $ echo link >someled/mode
++ *
++ * Ethernet-style link/activity LED:
++ * $ echo netdev >someled/trigger
++ * $ echo eth0 >someled/device_name
++ * $ echo "link tx rx" >someled/mode
++ *
++ * Modem-style tx/rx LEDs:
++ * $ echo netdev >led1/trigger
++ * $ echo ppp0 >led1/device_name
++ * $ echo tx >led1/mode
++ * $ echo netdev >led2/trigger
++ * $ echo ppp0 >led2/device_name
++ * $ echo rx >led2/mode
++ *
++ */
++
++#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 */
++ trigger_data->net_dev = dev_get_by_name(&init_net, trigger_data->device_name);
++ if (trigger_data->net_dev != NULL)
++ trigger_data->link_up = (dev_get_flags(trigger_data->net_dev) & IFF_LOWER_UP) != 0;
++ set_baseline_state(trigger_data); /* updates LEDs, may start timers */
++ }
++
++ write_unlock(&trigger_data->lock);
++ return size;
++}
++
++static DEVICE_ATTR(device_name, 0644, led_device_name_show, led_device_name_store);
++
++static ssize_t led_mode_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);
++
++ if (trigger_data->mode == 0) {
++ strcpy(buf, "none\n");
++ } else {
++ char *p = buf;
++ if (trigger_data->mode & MODE_LINK)
++ strcat(buf, "link ");
++ if (trigger_data->mode & MODE_TX)
++ strcat(buf, "tx ");
++ if (trigger_data->mode & MODE_RX)
++ strcat(buf, "rx ");
++ strcat(buf, "\n");
++ }
++
++ read_unlock(&trigger_data->lock);
++
++ return strlen(buf)+1;
++}
++
++static ssize_t led_mode_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;
++ char copybuf[1024];
++ int new_mode = -1;
++ char *p, *token;
++
++ /* take a copy since we don't want to trash the inbound buffer when using strsep */
++ strncpy(copybuf, buf, sizeof(copybuf));
++ copybuf[1023] = 0;
++ p = copybuf;
++
++ while ((token = strsep(&p, " \t\n")) != NULL) {
++ if (!*token)
++ continue;
++
++ if (new_mode == -1)
++ new_mode = 0;
++
++ if (!strcmp(token, "none"))
++ new_mode = 0;
++ else if (!strcmp(token, "tx"))
++ new_mode |= MODE_TX;
++ else if (!strcmp(token, "rx"))
++ new_mode |= MODE_RX;
++ else if (!strcmp(token, "link"))
++ new_mode |= MODE_LINK;
++ else
++ return -EINVAL;
++ }
++
++ if (new_mode == -1)
++ return -EINVAL;
++
++ write_lock(&trigger_data->lock);
++ trigger_data->mode = new_mode;
++ set_baseline_state(trigger_data);
++ write_unlock(&trigger_data->lock);
++
++ return size;
++}
++
++static DEVICE_ATTR(mode, 0644, led_mode_show, led_mode_store);
++
++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;
++ int ret = -EINVAL;
++ char *after;
++ unsigned long value = simple_strtoul(buf, &after, 10);
++ size_t count = after - buf;
++
++ if (*after && isspace(*after))
++ count++;
++
++ /* impose some basic bounds on the timer interval */
++ if (count == size && 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);
++ ret = count;
++ }
++
++ return ret;
++}
++
++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;
++ struct net_device_stats *dev_stats;
++ 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. */
++ led_set_brightness(trigger_data->led_cdev, ((trigger_data->mode & MODE_LINK) != 0 && trigger_data->link_up) ? LED_FULL : LED_OFF);
++ goto no_restart;
++ }
++
++ dev_stats = trigger_data->net_dev->get_stats(trigger_data->net_dev);
++ 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_mode);
++ if (rc)
++ goto err_out_device_name;
++ rc = device_create_file(led_cdev->dev, &dev_attr_interval);
++ if (rc)
++ goto err_out_mode;
++
++ register_netdevice_notifier(&trigger_data->notifier);
++ return;
++
++err_out_mode:
++ device_remove_file(led_cdev->dev, &dev_attr_mode);
++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_mode);
++ 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 <oliver@opencloud.com>");
++MODULE_DESCRIPTION("Netdev LED trigger");
++MODULE_LICENSE("GPL");
+Index: git/drivers/leds/Makefile
+===================================================================
+--- git.orig/drivers/leds/Makefile
++++ git/drivers/leds/Makefile
+@@ -26,3 +26,5 @@ obj-$(CONFIG_LEDS_NEO1973_GTA02) += leds
+ obj-$(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
++
+Index: git/drivers/leds/Kconfig
+===================================================================
+--- git.orig/drivers/leds/Kconfig
++++ git/drivers/leds/Kconfig
+@@ -159,4 +159,11 @@ config LEDS_TRIGGER_HEARTBEAT
+ load average.
+ If unsure, say Y.
+
++config LEDS_TRIGGER_NETDEV
++ tristate "LED Network Device Trigger"
++ depends on LEDS_TRIGGERS
++ help
++ This allows LEDs to be controlled by Network Device activity.
++ If unsure, say Y.
++
+ endif # NEW_LEDS
git.openpandora.org / openembedded.git / commitdiff