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-rw-r--r--drivers/leds/trigger/Kconfig9
-rw-r--r--drivers/leds/trigger/Makefile1
-rw-r--r--drivers/leds/trigger/ledtrig-netdev.c496
-rw-r--r--drivers/leds/trigger/ledtrig-transient.c33
4 files changed, 518 insertions, 21 deletions
diff --git a/drivers/leds/trigger/Kconfig b/drivers/leds/trigger/Kconfig
index bb090216b4dc..a2559b4fdfff 100644
--- a/drivers/leds/trigger/Kconfig
+++ b/drivers/leds/trigger/Kconfig
@@ -81,7 +81,7 @@ config LEDS_TRIGGER_ACTIVITY
tristate "LED activity Trigger"
depends on LEDS_TRIGGERS
help
- This allows LEDs to be controlled by a immediate CPU usage.
+ This allows LEDs to be controlled by an immediate CPU usage.
The flash frequency and duty cycle varies from faint flashes to
intense brightness depending on the instant CPU load.
If unsure, say N.
@@ -135,4 +135,11 @@ config LEDS_TRIGGER_PANIC
a different trigger.
If unsure, say Y.
+config LEDS_TRIGGER_NETDEV
+ tristate "LED Netdev Trigger"
+ depends on NET && LEDS_TRIGGERS
+ help
+ This allows LEDs to be controlled by network device activity.
+ If unsure, say Y.
+
endif # LEDS_TRIGGERS
diff --git a/drivers/leds/trigger/Makefile b/drivers/leds/trigger/Makefile
index 4a8b6cff7761..f3cfe1950538 100644
--- a/drivers/leds/trigger/Makefile
+++ b/drivers/leds/trigger/Makefile
@@ -12,3 +12,4 @@ obj-$(CONFIG_LEDS_TRIGGER_DEFAULT_ON) += ledtrig-default-on.o
obj-$(CONFIG_LEDS_TRIGGER_TRANSIENT) += ledtrig-transient.o
obj-$(CONFIG_LEDS_TRIGGER_CAMERA) += ledtrig-camera.o
obj-$(CONFIG_LEDS_TRIGGER_PANIC) += ledtrig-panic.o
+obj-$(CONFIG_LEDS_TRIGGER_NETDEV) += ledtrig-netdev.o
diff --git a/drivers/leds/trigger/ledtrig-netdev.c b/drivers/leds/trigger/ledtrig-netdev.c
new file mode 100644
index 000000000000..6df4781a6308
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-netdev.c
@@ -0,0 +1,496 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright 2017 Ben Whitten <ben.whitten@gmail.com>
+// Copyright 2007 Oliver Jowett <oliver@opencloud.com>
+//
+// LED Kernel Netdev Trigger
+//
+// Toggles the LED to reflect the link and traffic state of a named net device
+//
+// Derived from ledtrig-timer.c which is:
+// Copyright 2005-2006 Openedhand Ltd.
+// Author: Richard Purdie <rpurdie@openedhand.com>
+
+#include <linux/atomic.h>
+#include <linux/ctype.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/leds.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/spinlock.h>
+#include <linux/timer.h>
+#include "../leds.h"
+
+/*
+ * Configurable sysfs attributes:
+ *
+ * device_name - network device name to monitor
+ * interval - duration of LED blink, in milliseconds
+ * 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
+ *
+ */
+
+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];
+ atomic_t interval;
+ unsigned int last_activity;
+
+ unsigned long mode;
+#define NETDEV_LED_LINK 0
+#define NETDEV_LED_TX 1
+#define NETDEV_LED_RX 2
+#define NETDEV_LED_MODE_LINKUP 3
+};
+
+enum netdev_led_attr {
+ NETDEV_ATTR_LINK,
+ NETDEV_ATTR_TX,
+ NETDEV_ATTR_RX
+};
+
+static void set_baseline_state(struct led_netdev_data *trigger_data)
+{
+ int current_brightness;
+ struct led_classdev *led_cdev = trigger_data->led_cdev;
+
+ current_brightness = led_cdev->brightness;
+ if (current_brightness)
+ led_cdev->blink_brightness = current_brightness;
+ if (!led_cdev->blink_brightness)
+ led_cdev->blink_brightness = led_cdev->max_brightness;
+
+ if (!test_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode))
+ led_set_brightness(led_cdev, LED_OFF);
+ else {
+ if (test_bit(NETDEV_LED_LINK, &trigger_data->mode))
+ led_set_brightness(led_cdev,
+ led_cdev->blink_brightness);
+ else
+ led_set_brightness(led_cdev, LED_OFF);
+
+ /* If we are looking for RX/TX start periodically
+ * checking stats
+ */
+ if (test_bit(NETDEV_LED_TX, &trigger_data->mode) ||
+ test_bit(NETDEV_LED_RX, &trigger_data->mode))
+ schedule_delayed_work(&trigger_data->work, 0);
+ }
+}
+
+static ssize_t 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;
+ ssize_t len;
+
+ spin_lock_bh(&trigger_data->lock);
+ len = sprintf(buf, "%s\n", trigger_data->device_name);
+ spin_unlock_bh(&trigger_data->lock);
+
+ return len;
+}
+
+static ssize_t 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);
+
+ if (trigger_data->net_dev) {
+ dev_put(trigger_data->net_dev);
+ trigger_data->net_dev = NULL;
+ }
+
+ strncpy(trigger_data->device_name, buf, size);
+ if (size > 0 && trigger_data->device_name[size - 1] == '\n')
+ trigger_data->device_name[size - 1] = 0;
+
+ if (trigger_data->device_name[0] != 0)
+ trigger_data->net_dev =
+ dev_get_by_name(&init_net, trigger_data->device_name);
+
+ clear_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode);
+ if (trigger_data->net_dev != NULL)
+ if (netif_carrier_ok(trigger_data->net_dev))
+ set_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode);
+
+ trigger_data->last_activity = 0;
+
+ set_baseline_state(trigger_data);
+ spin_unlock_bh(&trigger_data->lock);
+
+ return size;
+}
+
+static DEVICE_ATTR_RW(device_name);
+
+static ssize_t netdev_led_attr_show(struct device *dev, char *buf,
+ enum netdev_led_attr attr)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct led_netdev_data *trigger_data = led_cdev->trigger_data;
+ int bit;
+
+ switch (attr) {
+ case NETDEV_ATTR_LINK:
+ bit = NETDEV_LED_LINK;
+ break;
+ case NETDEV_ATTR_TX:
+ bit = NETDEV_LED_TX;
+ break;
+ case NETDEV_ATTR_RX:
+ bit = NETDEV_LED_RX;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return sprintf(buf, "%u\n", test_bit(bit, &trigger_data->mode));
+}
+
+static ssize_t netdev_led_attr_store(struct device *dev, const char *buf,
+ size_t size, enum netdev_led_attr attr)
+{
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct led_netdev_data *trigger_data = led_cdev->trigger_data;
+ unsigned long state;
+ int ret;
+ int bit;
+
+ ret = kstrtoul(buf, 0, &state);
+ if (ret)
+ return ret;
+
+ switch (attr) {
+ case NETDEV_ATTR_LINK:
+ bit = NETDEV_LED_LINK;
+ break;
+ case NETDEV_ATTR_TX:
+ bit = NETDEV_LED_TX;
+ break;
+ case NETDEV_ATTR_RX:
+ bit = NETDEV_LED_RX;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ cancel_delayed_work_sync(&trigger_data->work);
+
+ if (state)
+ set_bit(bit, &trigger_data->mode);
+ else
+ clear_bit(bit, &trigger_data->mode);
+
+ set_baseline_state(trigger_data);
+
+ return size;
+}
+
+static ssize_t link_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return netdev_led_attr_show(dev, buf, NETDEV_ATTR_LINK);
+}
+
+static ssize_t link_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ return netdev_led_attr_store(dev, buf, size, NETDEV_ATTR_LINK);
+}
+
+static DEVICE_ATTR_RW(link);
+
+static ssize_t tx_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return netdev_led_attr_show(dev, buf, NETDEV_ATTR_TX);
+}
+
+static ssize_t tx_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ return netdev_led_attr_store(dev, buf, size, NETDEV_ATTR_TX);
+}
+
+static DEVICE_ATTR_RW(tx);
+
+static ssize_t rx_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return netdev_led_attr_show(dev, buf, NETDEV_ATTR_RX);
+}
+
+static ssize_t rx_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ return netdev_led_attr_store(dev, buf, size, NETDEV_ATTR_RX);
+}
+
+static DEVICE_ATTR_RW(rx);
+
+static ssize_t 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;
+
+ return sprintf(buf, "%u\n",
+ jiffies_to_msecs(atomic_read(&trigger_data->interval)));
+}
+
+static ssize_t 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 = kstrtoul(buf, 0, &value);
+ if (ret)
+ return ret;
+
+ /* impose some basic bounds on the timer interval */
+ if (value >= 5 && value <= 10000) {
+ cancel_delayed_work_sync(&trigger_data->work);
+
+ atomic_set(&trigger_data->interval, msecs_to_jiffies(value));
+ set_baseline_state(trigger_data); /* resets timer */
+ }
+
+ return size;
+}
+
+static DEVICE_ATTR_RW(interval);
+
+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);
+
+ clear_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode);
+ switch (evt) {
+ case NETDEV_REGISTER:
+ if (trigger_data->net_dev)
+ dev_put(trigger_data->net_dev);
+ dev_hold(dev);
+ trigger_data->net_dev = dev;
+ break;
+ case NETDEV_CHANGENAME:
+ case NETDEV_UNREGISTER:
+ if (trigger_data->net_dev) {
+ dev_put(trigger_data->net_dev);
+ trigger_data->net_dev = NULL;
+ }
+ break;
+ case NETDEV_UP:
+ case NETDEV_CHANGE:
+ if (netif_carrier_ok(dev))
+ set_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode);
+ break;
+ }
+
+ set_baseline_state(trigger_data);
+
+ 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 int new_activity;
+ struct rtnl_link_stats64 temp;
+ unsigned long interval;
+ int invert;
+
+ /* If we dont have a device, insure we are off */
+ if (!trigger_data->net_dev) {
+ led_set_brightness(trigger_data->led_cdev, LED_OFF);
+ return;
+ }
+
+ /* If we are not looking for RX/TX then return */
+ if (!test_bit(NETDEV_LED_TX, &trigger_data->mode) &&
+ !test_bit(NETDEV_LED_RX, &trigger_data->mode))
+ return;
+
+ dev_stats = dev_get_stats(trigger_data->net_dev, &temp);
+ new_activity =
+ (test_bit(NETDEV_LED_TX, &trigger_data->mode) ?
+ dev_stats->tx_packets : 0) +
+ (test_bit(NETDEV_LED_RX, &trigger_data->mode) ?
+ dev_stats->rx_packets : 0);
+
+ if (trigger_data->last_activity != new_activity) {
+ led_stop_software_blink(trigger_data->led_cdev);
+
+ invert = test_bit(NETDEV_LED_LINK, &trigger_data->mode);
+ interval = jiffies_to_msecs(
+ atomic_read(&trigger_data->interval));
+ /* base state is ON (link present) */
+ led_blink_set_oneshot(trigger_data->led_cdev,
+ &interval,
+ &interval,
+ invert);
+ trigger_data->last_activity = new_activity;
+ }
+
+ schedule_delayed_work(&trigger_data->work,
+ (atomic_read(&trigger_data->interval)*2));
+}
+
+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;
+ atomic_set(&trigger_data->interval, msecs_to_jiffies(50));
+ 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_rx);
+ if (rc)
+ goto err_out_link;
+ rc = device_create_file(led_cdev->dev, &dev_attr_tx);
+ if (rc)
+ goto err_out_rx;
+ rc = device_create_file(led_cdev->dev, &dev_attr_interval);
+ if (rc)
+ goto err_out_tx;
+ rc = register_netdevice_notifier(&trigger_data->notifier);
+ if (rc)
+ goto err_out_interval;
+ return;
+
+err_out_interval:
+ device_remove_file(led_cdev->dev, &dev_attr_interval);
+err_out_tx:
+ device_remove_file(led_cdev->dev, &dev_attr_tx);
+err_out_rx:
+ device_remove_file(led_cdev->dev, &dev_attr_rx);
+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_rx);
+ device_remove_file(led_cdev->dev, &dev_attr_tx);
+ device_remove_file(led_cdev->dev, &dev_attr_interval);
+
+ cancel_delayed_work_sync(&trigger_data->work);
+
+ if (trigger_data->net_dev)
+ dev_put(trigger_data->net_dev);
+
+ 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("Ben Whitten <ben.whitten@gmail.com>");
+MODULE_AUTHOR("Oliver Jowett <oliver@opencloud.com>");
+MODULE_DESCRIPTION("Netdev LED trigger");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/trigger/ledtrig-transient.c b/drivers/leds/trigger/ledtrig-transient.c
index 7acce64b692a..9d1769073562 100644
--- a/drivers/leds/trigger/ledtrig-transient.c
+++ b/drivers/leds/trigger/ledtrig-transient.c
@@ -1,22 +1,15 @@
-/*
- * LED Kernel Transient Trigger
- *
- * Copyright (C) 2012 Shuah Khan <shuahkhan@gmail.com>
- *
- * Based on Richard Purdie's ledtrig-timer.c and Atsushi Nemoto's
- * ledtrig-heartbeat.c
- * Design and use-case input from Jonas Bonn <jonas@southpole.se> and
- * Neil Brown <neilb@suse.de>
- *
- * 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.
- *
- */
-/*
- * Transient trigger allows one shot timer activation. Please refer to
- * Documentation/leds/ledtrig-transient.txt for details
-*/
+// SPDX-License-Identifier: GPL-2.0
+//
+// LED Kernel Transient Trigger
+//
+// Transient trigger allows one shot timer activation. Please refer to
+// Documentation/leds/ledtrig-transient.txt for details
+// Copyright (C) 2012 Shuah Khan <shuahkhan@gmail.com>
+//
+// Based on Richard Purdie's ledtrig-timer.c and Atsushi Nemoto's
+// ledtrig-heartbeat.c
+// Design and use-case input from Jonas Bonn <jonas@southpole.se> and
+// Neil Brown <neilb@suse.de>
#include <linux/module.h>
#include <linux/kernel.h>
@@ -238,4 +231,4 @@ module_exit(transient_trig_exit);
MODULE_AUTHOR("Shuah Khan <shuahkhan@gmail.com>");
MODULE_DESCRIPTION("Transient LED trigger");
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.39.0) at 2025-02-21 21:08:03 +0300