diff options
Diffstat (limited to 'target/linux/generic/backport-4.14/400-v4.16-leds-trigger-Introduce-a-NETDEV-trigger.patch')
| -rw-r--r-- | target/linux/generic/backport-4.14/400-v4.16-leds-trigger-Introduce-a-NETDEV-trigger.patch | 588 |
1 files changed, 588 insertions, 0 deletions
diff --git a/target/linux/generic/backport-4.14/400-v4.16-leds-trigger-Introduce-a-NETDEV-trigger.patch b/target/linux/generic/backport-4.14/400-v4.16-leds-trigger-Introduce-a-NETDEV-trigger.patch new file mode 100644 index 0000000000..b7d680a11b --- /dev/null +++ b/target/linux/generic/backport-4.14/400-v4.16-leds-trigger-Introduce-a-NETDEV-trigger.patch @@ -0,0 +1,588 @@ +From 06f502f57d0d7728f9fa0f157ec5e4111ddb98f6 Mon Sep 17 00:00:00 2001 +From: Ben Whitten <ben.whitten@gmail.com> +Date: Sun, 10 Dec 2017 21:17:55 +0000 +Subject: [PATCH] leds: trigger: Introduce a NETDEV trigger + +This commit introduces a NETDEV trigger for named device +activity. Available triggers are link, rx, and tx. + +Signed-off-by: Ben Whitten <ben.whitten@gmail.com> +Acked-by: Pavel Machek <pavel@ucw.cz> +Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com> +--- + .../ABI/testing/sysfs-class-led-trigger-netdev | 45 ++ + drivers/leds/trigger/Kconfig | 7 + + drivers/leds/trigger/Makefile | 1 + + drivers/leds/trigger/ledtrig-netdev.c | 496 +++++++++++++++++++++ + 4 files changed, 549 insertions(+) + create mode 100644 Documentation/ABI/testing/sysfs-class-led-trigger-netdev + create mode 100644 drivers/leds/trigger/ledtrig-netdev.c + +--- /dev/null ++++ b/Documentation/ABI/testing/sysfs-class-led-trigger-netdev +@@ -0,0 +1,45 @@ ++What: /sys/class/leds/<led>/device_name ++Date: Dec 2017 ++KernelVersion: 4.16 ++Contact: linux-leds@vger.kernel.org ++Description: ++ Specifies the network device name to monitor. ++ ++What: /sys/class/leds/<led>/interval ++Date: Dec 2017 ++KernelVersion: 4.16 ++Contact: linux-leds@vger.kernel.org ++Description: ++ Specifies the duration of the LED blink in milliseconds. ++ Defaults to 50 ms. ++ ++What: /sys/class/leds/<led>/link ++Date: Dec 2017 ++KernelVersion: 4.16 ++Contact: linux-leds@vger.kernel.org ++Description: ++ Signal the link state of the named network device. ++ If set to 0 (default), the LED's normal state is off. ++ If set to 1, the LED's normal state reflects the link state ++ of the named network device. ++ Setting this value also immediately changes the LED state. ++ ++What: /sys/class/leds/<led>/tx ++Date: Dec 2017 ++KernelVersion: 4.16 ++Contact: linux-leds@vger.kernel.org ++Description: ++ Signal transmission of data on the named network device. ++ If set to 0 (default), the LED will not blink on transmission. ++ If set to 1, the LED will blink for the milliseconds specified ++ in interval to signal transmission. ++ ++What: /sys/class/leds/<led>/rx ++Date: Dec 2017 ++KernelVersion: 4.16 ++Contact: linux-leds@vger.kernel.org ++Description: ++ Signal reception of data on the named network device. ++ If set to 0 (default), the LED will not blink on reception. ++ If set to 1, the LED will blink for the milliseconds specified ++ in interval to signal reception. +--- a/drivers/leds/trigger/Kconfig ++++ b/drivers/leds/trigger/Kconfig +@@ -126,4 +126,11 @@ 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 +--- a/drivers/leds/trigger/Makefile ++++ b/drivers/leds/trigger/Makefile +@@ -11,3 +11,4 @@ obj-$(CONFIG_LEDS_TRIGGER_DEFAULT_ON) += + obj-$(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 +--- /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"); |