netlink_kernel_create is not working with latest linux kernel

c kernel netlink
Ibrar Ahmed picture Ibrar Ahmed · Apr 11, 2013 · Viewed 8k times · Source

I am getting compiler error while compiling my old kernel module which is using netlink functions. 

int
init_module()
{
    /* Initialize the Netlink kernel interface */
    nl_sk = netlink_kernel_create(&init_net, 17, 0, recv_cmd, NULL, THIS_MODULE);
    if(!nl_sk)
    {
            printk(KERN_INFO "failed to initialize system (error: 1001)\n");
            return -ENOMEM;
    }
 ....

Previously it works fine but now I am getting this error.

error: too many arguments to function 'netlink_kernel_create'

OS Information

uname -a

Linux ibrar-ahmed 3.8.0-17-generic #27-Ubuntu SMP Sun Apr 7 19:39:35 UTC 2013 x86_64  x86_64 x86_64 GNU/Linux

Answer

Javid Pack picture Javid Pack · Jul 12, 2013

Just replace

nl_sk = netlink_kernel_create(&init_net, 17, 0, recv_cmd, NULL, THIS_MODULE);

with the following

struct netlink_kernel_cfg cfg = {
    .input = recv_cmd,
};

nl_sk = netlink_kernel_create(&init_net, 17, &cfg);

and it should work. I ran into the same problems.

Related questions

Multicast from kernel to user space via Netlink in C

I was trying to write a simple program communicating between kernel and user space using Netlink. Basically here's what I wanted to achieve: User space program starts binding to a user defined multicast group. Insert kernel module Kernel module sends …

Read More
"FATAL: Module not found error" using modprobe

I have a problem with modprobe command... I compiled the hello world module and loaded it with insmod, it works fine and when I do lsmod, I can see it in the output list. But when I insert this module …

Read More
why is u8 u16 u32 u64 used instead of unsigned int in kernel programming

I see u8 u16 u32 u64 data types being used in kernel code. And I am wondering why is there need to use u8 or u16 or u32 or u64 and not unsigned int?

Read More