kernel: Replace ledtrig-netdev with upstream backport

The ledtrig-netdev was added to upstream Linux kernel 4.16, replace our
own version with the patch based on the upstream version.
This will remove the ledtrig-netdev support from kernel 3.18, because I
not want to spend time on backporting it to 3.18. This will make it
easier to use the upstream version with kernel 4.19, by just not
applying this patch.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

1 files changed, 0 insertions, 444 deletions

diff --git a/target/linux/generic/files/drivers/leds/ledtrig-netdev.c b/target/linux/generic/files/drivers/leds/ledtrig-netdev.c
deleted file mode 100644
index 8d3249010d..0000000000
--- a/target/linux/generic/files/drivers/leds/ledtrig-netdev.c
+++ /dev/null
@@ -1,444 +0,0 @@
-/*
- * 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/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 {
-	spinlock_t lock;
-
-	struct delayed_work work;
-	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)
-		schedule_delayed_work(&trigger_data->work, trigger_data->interval);
-}
-
-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;
-
-	spin_lock_bh(&trigger_data->lock);
-	sprintf(buf, "%s\n", trigger_data->device_name);
-	spin_unlock_bh(&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 >= IFNAMSIZ)
-		return -EINVAL;
-
-	cancel_delayed_work_sync(&trigger_data->work);
-
-	spin_lock_bh(&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;
-	trigger_data->link_up = 0;
-	trigger_data->last_activity = 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);
-	spin_unlock_bh(&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;
-
-	spin_lock_bh(&trigger_data->lock);
-
-	if (trigger_data->mode == 0) {
-		strcpy(buf, "none\n");
-	} else {
-		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");
-	}
-
-	spin_unlock_bh(&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[128];
-	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[sizeof(copybuf) - 1] = 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;
-
-	cancel_delayed_work_sync(&trigger_data->work);
-
-	spin_lock_bh(&trigger_data->lock);
-	trigger_data->mode = new_mode;
-	set_baseline_state(trigger_data);
-	spin_unlock_bh(&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;
-
-	spin_lock_bh(&trigger_data->lock);
-	sprintf(buf, "%u\n", jiffies_to_msecs(trigger_data->interval));
-	spin_unlock_bh(&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 (isspace(*after))
-		count++;
-
-	/* impose some basic bounds on the timer interval */
-	if (count == size && value >= 5 && value <= 10000) {
-		cancel_delayed_work_sync(&trigger_data->work);
-
-		spin_lock_bh(&trigger_data->lock);
-		trigger_data->interval = msecs_to_jiffies(value);
-		set_baseline_state(trigger_data); /* resets timer */
-		spin_unlock_bh(&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 = netdev_notifier_info_to_dev((struct netdev_notifier_info *) 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 && evt != NETDEV_CHANGENAME)
-		return NOTIFY_DONE;
-
-	if (strcmp(dev->name, trigger_data->device_name))
-		return NOTIFY_DONE;
-
-	cancel_delayed_work_sync(&trigger_data->work);
-
-	spin_lock_bh(&trigger_data->lock);
-
-	if (evt == NETDEV_REGISTER || evt == NETDEV_CHANGENAME) {
-		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:
-	spin_unlock_bh(&trigger_data->lock);
-	return NOTIFY_DONE;
-}
-
-/* here's the real work! */
-static void netdev_trig_work(struct work_struct *work)
-{
-	struct led_netdev_data *trigger_data = container_of(work, struct led_netdev_data, work.work);
-	struct rtnl_link_stats64 *dev_stats;
-	unsigned new_activity;
-	struct rtnl_link_stats64 temp;
-
-	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);
-		return;
-	}
-
-	dev_stats = dev_get_stats(trigger_data->net_dev, &temp);
-	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;
-	schedule_delayed_work(&trigger_data->work, trigger_data->interval);
-}
-
-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;
-
-	spin_lock_init(&trigger_data->lock);
-
-	trigger_data->notifier.notifier_call = netdev_trig_notify;
-	trigger_data->notifier.priority = 10;
-
-	INIT_DELAYED_WORK(&trigger_data->work, netdev_trig_work);
-
-	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);
-
-		cancel_delayed_work_sync(&trigger_data->work);
-
-		spin_lock_bh(&trigger_data->lock);
-
-		if (trigger_data->net_dev) {
-			dev_put(trigger_data->net_dev);
-			trigger_data->net_dev = NULL;
-		}
-
-		spin_unlock_bh(&trigger_data->lock);
-
-		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");