netlink problem

[Abhijit Gadgil <gabhijit@ee.iitb.ac.in>]

Hi all,

I am writing a module , in which i need to pass some informattion from
userspace to kernel space. So I decided to use netlink for this. One
netlink protocol number is hijacked. (4 ref. netlink.h) since it is nopt
used anywhere.

what i do is as follows.

mymodule_init()
{

   ...

   return mymodulenetlink_init();
}

mymodulenetlink_init()
{
	sk = netlink_kernel_create(NETLINK_MYMODUE,
                                   mymodule_rec_function);

	printk(sk->socket);
}

the printk statement above indicates the sk->socket is NULL. However this
could not happen if one follows
netlink_kernel_create->netlink_create->sock_alloc->sock_init_data
and returns a valid pointer (for sk, which it is returning.) any ideas?

regards,

-abhijit

PS : any other mechanism for passing data across userspace/kernelspace ?


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