Question

this is how the function looks like:

  struct net_device_stats* (*get_stats)(struct net_device *dev);

I simply need to call this function in my code and get it’s results in a net_device_stats struct I declared earlier. Can anyone give a simple implementation code for this?

Answer 1

This is not a function. Its the declaration of a function pointer get_stats which points to a function which receives a pointer to the structure net_device and returns a pointer to a structure of type net_device_stats

Here is one use case

struct net_device *dev;
struct net_device_stats *device;

device = get_stats(dev);

EDIT From your comments, I see you are using an older version of the kernel. IN later kernels , structure net_device still resides in linux/netdevice.h but there’s no get_stats function pointer. Its changed into ndo_get_stats and it is now under another structure net_device_ops

So start using these new function pointers.