netlink_kernel_create is not working with latest linux kernel

Question

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

int
init_module()
{
    /* Initialize the Netlin         


        

Answer 1

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.

Answer 2

    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.");

Answer 3

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.