netlink_kernel_create无法使用最新的Linux内核

Question

我在编译kernel使用netlink函数的旧模块时遇到编译器错误.

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;
    }
 ....

以前它工作正常,但现在我收到此错误.

error: too many arguments to function 'netlink_kernel_create'

OS信息

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 1

只需更换

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

以下内容

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

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

它应该工作.我遇到了同样的问题.

Answer 2

那是因为在3.8中netlink_kernel_create原型已被更改:

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

(和qv http://lxr.linux.no/linux+v3.8/include/linux/netlink.h#L48)

你别无选择,只能重写内核模块,删除那个额外的参数(THIS_MODULE),以及实现netlink_kernel_cfg结构.