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authorHauke Mehrtens <hauke@hauke-m.de>2018-11-14 21:22:39 +0100
committerHauke Mehrtens <hauke@hauke-m.de>2018-12-15 12:50:06 +0100
commitaa3b6a08c5616fdebd3b219f021a9674533a6519 (patch)
tree1704c0e19bf84fb8977390d4bcdad53cab943ea7 /target/linux/generic/files
parent42e62a8a10c8276ba09434f88dc08f0967ba7bb1 (diff)
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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>
Diffstat (limited to 'target/linux/generic/files')
-rw-r--r--target/linux/generic/files/drivers/leds/ledtrig-netdev.c444
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");