NETDEV_HAS_UPPER_DEV(9) Network device support NETDEV_HAS_UPPER_DEV(9)NAME
netdev_has_upper_dev - Check if device is linked to an upper device
SYNOPSIS
bool netdev_has_upper_dev(struct net_device * dev, struct net_device * upper_dev);
ARGUMENTS
dev
device
upper_dev
upper device to check
DESCRIPTION
Find out if a device is linked to specified upper device and return true in case it is. Note that this checks only immediate upper device,
not through a complete stack of devices. The caller must hold the RTNL lock.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 NETDEV_HAS_UPPER_DEV(9)
Check Out this Related Man Page
DEVICE_CREATE(9) Device drivers infrastructure DEVICE_CREATE(9)NAME
device_create - creates a device and registers it with sysfs
SYNOPSIS
struct device * device_create(struct class * class, struct device * parent, dev_t devt, void * drvdata, const char * fmt, ...);
ARGUMENTS
class
pointer to the struct class that this device should be registered to
parent
pointer to the parent struct device of this new device, if any
devt
the dev_t for the char device to be added
drvdata
the data to be added to the device for callbacks
fmt
string for the device's name
...
variable arguments
DESCRIPTION
This function can be used by char device classes. A struct device will be created in sysfs, registered to the specified class.
A "dev" file will be created, showing the dev_t for the device, if the dev_t is not 0,0. If a pointer to a parent struct device is passed
in, the newly created struct device will be a child of that device in sysfs. The pointer to the struct device will be returned from the
call. Any further sysfs files that might be required can be created using this pointer.
Returns struct device pointer on success, or ERR_PTR on error.
NOTE
the struct class passed to this function must have previously been created with a call to class_create.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 DEVICE_CREATE(9)
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