Hi!
On 13:49 Mon 02 Mar , Daniel Baluta wrote:
> Hello ,
>
> What is the difference between those two functions?
>
> I've looked through the source code and i found this:
>
>
> int sock_create(int family, int type, int protocol, struct socket **res)
> {
> return __sock_create(current->nsproxy->net_ns, family, type,
> protocol, res, 0);
> }
>
> int sock_create_kern(int family, int type, int protocol, struct socket **res)
> {
> return __sock_create(&init_net, family, type, protocol, res, 1);
> }
>
> Any ideas?
Let's see...
- current refers to the task_struct as defined in include/linux/sched.h
- current->nsproxy->net_ns points to the network namespace "struct net" of
the running process as defined in include/net/net_namespace.h
- the last parameter of "__sock_create" is "int kern"
My guess is that you use the first one if you in a system call and you are
creating a socket for the process - and the second one if you are anywhere in
the kernel and want to create a socket, because you have some client or server
running in kernel mode (e.g. nfs). I think interrupts have to be enabled when
calling any of these functions.
-Michi
--
programing a layer 3+4 network protocol for mesh networks
see http://michaelblizek.twilightparadox.com
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