CODEWITHSUNDEEP
ckernelnetlink
Ibrar Ahmed
Ibrar Ahmed

Reputation: 1089

netlink_kernel_create is not working with latest linux kernel

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

Upvotes: 11

Views: 8896

Answers (3)

leesagacious
leesagacious

Reputation: 322

    netlink_kernel_create(struct net *net, int unit, struct netlink_kernel_cfg *cfg)

    struct netlink_kernel_cfg cfg = {
        .groups = SELNLGRP_MAX,
        .flags  = NL_CFG_F_NONROOT_RECV,
    };

    selnl = netlink_kernel_create(&init_net, NETLINK_SELINUX, &cfg);
    if (selnl == NULL)
        panic("SELinux:  Cannot create netlink socket.");

Upvotes: 0

Javid Pack
Javid Pack

Reputation: 482

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.

Upvotes: 13

Technologeeks
Technologeeks

Reputation: 7897

That's because in 3.8 the netlink_kernel_create prototype has been changed:

netlink_kernel_create(struct net *net, int unit, struct netlink_kernel_cfg *cfg)

(and q.v. http://lxr.linux.no/linux+v3.8/include/linux/netlink.h#L48)

You've no option but to rewrite the kernel module, and remove that extra argument (THIS_MODULE), as well as implement the netlink_kernel_cfg struct.

Upvotes: 6

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