1 diff -Naur linux-3.14.22.org/drivers/leds/trigger/Kconfig linux-3.14.22/drivers/leds/trigger/Kconfig
2 --- linux-3.14.22.org/drivers/leds/trigger/Kconfig 2014-10-15 08:42:04.000000000 +0200
3 +++ linux-3.14.22/drivers/leds/trigger/Kconfig 2014-11-06 17:52:02.303748375 +0100
5 This enables direct flash/torch on/off by the driver, kernel space.
8 +config LEDS_TRIGGER_NETDEV
9 + tristate "LED Netdev Trigger"
10 + depends on NET && LEDS_TRIGGERS
12 + This allows LEDs to be controlled by network device activity.
16 diff -Naur linux-3.14.22.org/drivers/leds/trigger/ledtrig-netdev.c linux-3.14.22/drivers/leds/trigger/ledtrig-netdev.c
17 --- linux-3.14.22.org/drivers/leds/trigger/ledtrig-netdev.c 1970-01-01 01:00:00.000000000 +0100
18 +++ linux-3.14.22/drivers/leds/trigger/ledtrig-netdev.c 2014-11-06 17:47:09.913748236 +0100
21 + * LED Kernel Netdev Trigger
23 + * Toggles the LED to reflect the link and traffic state of a named net device
25 + * Copyright 2007 Oliver Jowett <oliver@opencloud.com>
27 + * Derived from ledtrig-timer.c which is:
28 + * Copyright 2005-2006 Openedhand Ltd.
29 + * Author: Richard Purdie <rpurdie@openedhand.com>
31 + * This program is free software; you can redistribute it and/or modify
32 + * it under the terms of the GNU General Public License version 2 as
33 + * published by the Free Software Foundation.
37 +#include <linux/module.h>
38 +#include <linux/jiffies.h>
39 +#include <linux/kernel.h>
40 +#include <linux/init.h>
41 +#include <linux/list.h>
42 +#include <linux/spinlock.h>
43 +#include <linux/device.h>
44 +#include <linux/netdevice.h>
45 +#include <linux/timer.h>
46 +#include <linux/ctype.h>
47 +#include <linux/leds.h>
52 + * Configurable sysfs attributes:
54 + * device_name - network device name to monitor
56 + * interval - duration of LED blink, in milliseconds
58 + * mode - either "none" (LED is off) or a space separated list of one or more of:
59 + * link: LED's normal state reflects whether the link is up (has carrier) or not
60 + * tx: LED blinks on transmitted data
61 + * rx: LED blinks on receive data
65 + * Simple link status LED:
66 + * $ echo netdev >someled/trigger
67 + * $ echo eth0 >someled/device_name
68 + * $ echo link >someled/mode
70 + * Ethernet-style link/activity LED:
71 + * $ echo netdev >someled/trigger
72 + * $ echo eth0 >someled/device_name
73 + * $ echo "link tx rx" >someled/mode
75 + * Modem-style tx/rx LEDs:
76 + * $ echo netdev >led1/trigger
77 + * $ echo ppp0 >led1/device_name
78 + * $ echo tx >led1/mode
79 + * $ echo netdev >led2/trigger
80 + * $ echo ppp0 >led2/device_name
81 + * $ echo rx >led2/mode
89 +struct led_netdev_data {
92 + struct timer_list timer;
93 + struct notifier_block notifier;
95 + struct led_classdev *led_cdev;
96 + struct net_device *net_dev;
98 + char device_name[IFNAMSIZ];
102 + unsigned last_activity;
105 +static void set_baseline_state(struct led_netdev_data *trigger_data)
107 + if ((trigger_data->mode & MODE_LINK) != 0 && trigger_data->link_up)
108 + led_set_brightness(trigger_data->led_cdev, LED_FULL);
110 + led_set_brightness(trigger_data->led_cdev, LED_OFF);
112 + if ((trigger_data->mode & (MODE_TX | MODE_RX)) != 0 && trigger_data->link_up)
113 + mod_timer(&trigger_data->timer, jiffies + trigger_data->interval);
115 + del_timer(&trigger_data->timer);
118 +static ssize_t led_device_name_show(struct device *dev,
119 + struct device_attribute *attr, char *buf)
121 + struct led_classdev *led_cdev = dev_get_drvdata(dev);
122 + struct led_netdev_data *trigger_data = led_cdev->trigger_data;
124 + read_lock(&trigger_data->lock);
125 + sprintf(buf, "%s\n", trigger_data->device_name);
126 + read_unlock(&trigger_data->lock);
128 + return strlen(buf) + 1;
131 +static ssize_t led_device_name_store(struct device *dev,
132 + struct device_attribute *attr, const char *buf, size_t size)
134 + struct led_classdev *led_cdev = dev_get_drvdata(dev);
135 + struct led_netdev_data *trigger_data = led_cdev->trigger_data;
137 + if (size < 0 || size >= IFNAMSIZ)
140 + write_lock(&trigger_data->lock);
142 + strcpy(trigger_data->device_name, buf);
143 + if (size > 0 && trigger_data->device_name[size-1] == '\n')
144 + trigger_data->device_name[size-1] = 0;
146 + if (trigger_data->device_name[0] != 0) {
147 + /* check for existing device to update from */
148 + trigger_data->net_dev = dev_get_by_name(&init_net, trigger_data->device_name);
149 + if (trigger_data->net_dev != NULL)
150 + trigger_data->link_up = (dev_get_flags(trigger_data->net_dev) & IFF_LOWER_UP) != 0;
151 + set_baseline_state(trigger_data); /* updates LEDs, may start timers */
154 + write_unlock(&trigger_data->lock);
158 +static DEVICE_ATTR(device_name, 0644, led_device_name_show, led_device_name_store);
160 +static ssize_t led_mode_show(struct device *dev,
161 + struct device_attribute *attr, char *buf)
163 + struct led_classdev *led_cdev = dev_get_drvdata(dev);
164 + struct led_netdev_data *trigger_data = led_cdev->trigger_data;
166 + read_lock(&trigger_data->lock);
168 + if (trigger_data->mode == 0) {
169 + strcpy(buf, "none\n");
171 + if (trigger_data->mode & MODE_LINK)
172 + strcat(buf, "link ");
173 + if (trigger_data->mode & MODE_TX)
174 + strcat(buf, "tx ");
175 + if (trigger_data->mode & MODE_RX)
176 + strcat(buf, "rx ");
180 + read_unlock(&trigger_data->lock);
182 + return strlen(buf)+1;
185 +static ssize_t led_mode_store(struct device *dev,
186 + struct device_attribute *attr, const char *buf, size_t size)
188 + struct led_classdev *led_cdev = dev_get_drvdata(dev);
189 + struct led_netdev_data *trigger_data = led_cdev->trigger_data;
194 + /* take a copy since we don't want to trash the inbound buffer when using strsep */
195 + strncpy(copybuf, buf, sizeof(copybuf));
196 + copybuf[sizeof(copybuf) - 1] = 0;
199 + while ((token = strsep(&p, " \t\n")) != NULL) {
203 + if (new_mode == -1)
206 + if (!strcmp(token, "none"))
208 + else if (!strcmp(token, "tx"))
209 + new_mode |= MODE_TX;
210 + else if (!strcmp(token, "rx"))
211 + new_mode |= MODE_RX;
212 + else if (!strcmp(token, "link"))
213 + new_mode |= MODE_LINK;
218 + if (new_mode == -1)
221 + write_lock(&trigger_data->lock);
222 + trigger_data->mode = new_mode;
223 + set_baseline_state(trigger_data);
224 + write_unlock(&trigger_data->lock);
229 +static DEVICE_ATTR(mode, 0644, led_mode_show, led_mode_store);
231 +static ssize_t led_interval_show(struct device *dev,
232 + struct device_attribute *attr, char *buf)
234 + struct led_classdev *led_cdev = dev_get_drvdata(dev);
235 + struct led_netdev_data *trigger_data = led_cdev->trigger_data;
237 + read_lock(&trigger_data->lock);
238 + sprintf(buf, "%u\n", jiffies_to_msecs(trigger_data->interval));
239 + read_unlock(&trigger_data->lock);
241 + return strlen(buf) + 1;
244 +static ssize_t led_interval_store(struct device *dev,
245 + struct device_attribute *attr, const char *buf, size_t size)
247 + struct led_classdev *led_cdev = dev_get_drvdata(dev);
248 + struct led_netdev_data *trigger_data = led_cdev->trigger_data;
251 + unsigned long value = simple_strtoul(buf, &after, 10);
252 + size_t count = after - buf;
254 + if (isspace(*after))
257 + /* impose some basic bounds on the timer interval */
258 + if (count == size && value >= 5 && value <= 10000) {
259 + write_lock(&trigger_data->lock);
260 + trigger_data->interval = msecs_to_jiffies(value);
261 + set_baseline_state(trigger_data); /* resets timer */
262 + write_unlock(&trigger_data->lock);
269 +static DEVICE_ATTR(interval, 0644, led_interval_show, led_interval_store);
271 +static int netdev_trig_notify(struct notifier_block *nb,
275 + struct net_device *dev = netdev_notifier_info_to_dev((struct netdev_notifier_info *) dv);
276 + struct led_netdev_data *trigger_data = container_of(nb, struct led_netdev_data, notifier);
278 + if (evt != NETDEV_UP && evt != NETDEV_DOWN && evt != NETDEV_CHANGE && evt != NETDEV_REGISTER && evt != NETDEV_UNREGISTER)
279 + return NOTIFY_DONE;
281 + write_lock(&trigger_data->lock);
283 + if (strcmp(dev->name, trigger_data->device_name))
286 + if (evt == NETDEV_REGISTER) {
287 + if (trigger_data->net_dev != NULL)
288 + dev_put(trigger_data->net_dev);
290 + trigger_data->net_dev = dev;
291 + trigger_data->link_up = 0;
295 + if (evt == NETDEV_UNREGISTER && trigger_data->net_dev != NULL) {
296 + dev_put(trigger_data->net_dev);
297 + trigger_data->net_dev = NULL;
301 + /* UP / DOWN / CHANGE */
303 + trigger_data->link_up = (evt != NETDEV_DOWN && netif_carrier_ok(dev));
304 + set_baseline_state(trigger_data);
307 + write_unlock(&trigger_data->lock);
308 + return NOTIFY_DONE;
311 +/* here's the real work! */
312 +static void netdev_trig_timer(unsigned long arg)
314 + struct led_netdev_data *trigger_data = (struct led_netdev_data *)arg;
315 + struct rtnl_link_stats64 *dev_stats;
316 + unsigned new_activity;
317 + struct rtnl_link_stats64 temp;
319 + write_lock(&trigger_data->lock);
321 + if (!trigger_data->link_up || !trigger_data->net_dev || (trigger_data->mode & (MODE_TX | MODE_RX)) == 0) {
322 + /* we don't need to do timer work, just reflect link state. */
323 + led_set_brightness(trigger_data->led_cdev, ((trigger_data->mode & MODE_LINK) != 0 && trigger_data->link_up) ? LED_FULL : LED_OFF);
327 + dev_stats = dev_get_stats(trigger_data->net_dev, &temp);
329 + ((trigger_data->mode & MODE_TX) ? dev_stats->tx_packets : 0) +
330 + ((trigger_data->mode & MODE_RX) ? dev_stats->rx_packets : 0);
332 + if (trigger_data->mode & MODE_LINK) {
333 + /* base state is ON (link present) */
334 + /* if there's no link, we don't get this far and the LED is off */
336 + /* OFF -> ON always */
337 + /* ON -> OFF on activity */
338 + if (trigger_data->led_cdev->brightness == LED_OFF) {
339 + led_set_brightness(trigger_data->led_cdev, LED_FULL);
340 + } else if (trigger_data->last_activity != new_activity) {
341 + led_set_brightness(trigger_data->led_cdev, LED_OFF);
344 + /* base state is OFF */
345 + /* ON -> OFF always */
346 + /* OFF -> ON on activity */
347 + if (trigger_data->led_cdev->brightness == LED_FULL) {
348 + led_set_brightness(trigger_data->led_cdev, LED_OFF);
349 + } else if (trigger_data->last_activity != new_activity) {
350 + led_set_brightness(trigger_data->led_cdev, LED_FULL);
354 + trigger_data->last_activity = new_activity;
355 + mod_timer(&trigger_data->timer, jiffies + trigger_data->interval);
358 + write_unlock(&trigger_data->lock);
361 +static void netdev_trig_activate(struct led_classdev *led_cdev)
363 + struct led_netdev_data *trigger_data;
366 + trigger_data = kzalloc(sizeof(struct led_netdev_data), GFP_KERNEL);
370 + rwlock_init(&trigger_data->lock);
372 + trigger_data->notifier.notifier_call = netdev_trig_notify;
373 + trigger_data->notifier.priority = 10;
375 + setup_timer(&trigger_data->timer, netdev_trig_timer, (unsigned long) trigger_data);
377 + trigger_data->led_cdev = led_cdev;
378 + trigger_data->net_dev = NULL;
379 + trigger_data->device_name[0] = 0;
381 + trigger_data->mode = 0;
382 + trigger_data->interval = msecs_to_jiffies(50);
383 + trigger_data->link_up = 0;
384 + trigger_data->last_activity = 0;
386 + led_cdev->trigger_data = trigger_data;
388 + rc = device_create_file(led_cdev->dev, &dev_attr_device_name);
391 + rc = device_create_file(led_cdev->dev, &dev_attr_mode);
393 + goto err_out_device_name;
394 + rc = device_create_file(led_cdev->dev, &dev_attr_interval);
398 + register_netdevice_notifier(&trigger_data->notifier);
402 + device_remove_file(led_cdev->dev, &dev_attr_mode);
403 +err_out_device_name:
404 + device_remove_file(led_cdev->dev, &dev_attr_device_name);
406 + led_cdev->trigger_data = NULL;
407 + kfree(trigger_data);
410 +static void netdev_trig_deactivate(struct led_classdev *led_cdev)
412 + struct led_netdev_data *trigger_data = led_cdev->trigger_data;
414 + if (trigger_data) {
415 + unregister_netdevice_notifier(&trigger_data->notifier);
417 + device_remove_file(led_cdev->dev, &dev_attr_device_name);
418 + device_remove_file(led_cdev->dev, &dev_attr_mode);
419 + device_remove_file(led_cdev->dev, &dev_attr_interval);
421 + write_lock(&trigger_data->lock);
423 + if (trigger_data->net_dev) {
424 + dev_put(trigger_data->net_dev);
425 + trigger_data->net_dev = NULL;
428 + write_unlock(&trigger_data->lock);
430 + del_timer_sync(&trigger_data->timer);
432 + kfree(trigger_data);
436 +static struct led_trigger netdev_led_trigger = {
438 + .activate = netdev_trig_activate,
439 + .deactivate = netdev_trig_deactivate,
442 +static int __init netdev_trig_init(void)
444 + return led_trigger_register(&netdev_led_trigger);
447 +static void __exit netdev_trig_exit(void)
449 + led_trigger_unregister(&netdev_led_trigger);
452 +module_init(netdev_trig_init);
453 +module_exit(netdev_trig_exit);
455 +MODULE_AUTHOR("Oliver Jowett <oliver@opencloud.com>");
456 +MODULE_DESCRIPTION("Netdev LED trigger");
457 +MODULE_LICENSE("GPL");
458 diff -Naur linux-3.14.22.org/drivers/leds/trigger/Makefile linux-3.14.22/drivers/leds/trigger/Makefile
459 --- linux-3.14.22.org/drivers/leds/trigger/Makefile 2014-10-15 08:42:04.000000000 +0200
460 +++ linux-3.14.22/drivers/leds/trigger/Makefile 2014-11-06 17:51:29.818748360 +0100
462 obj-$(CONFIG_LEDS_TRIGGER_DEFAULT_ON) += ledtrig-default-on.o
463 obj-$(CONFIG_LEDS_TRIGGER_TRANSIENT) += ledtrig-transient.o
464 obj-$(CONFIG_LEDS_TRIGGER_CAMERA) += ledtrig-camera.o
465 +obj-$(CONFIG_LEDS_TRIGGER_NETDEV) += ledtrig-netdev.o