Re: [Bridge] Can it possible to call the bridge ioctl calls from another module code...

[Stephen Hemminger <shemminger@osdl.org>]

On Tue, 10 May 2005 06:23:24 +0530
srinivas naga vutukuri <srinivas.vutukuri@gmail.com> wrote:

> Hi,
> 
>           I am using 2.4.x kernel and the kernel native bridge code
> (for bridging).
> I am creating Pseudo net_devices'  which should be added to the bridge
> interfaces.
> without intervention of bridge-utils (ie., brctl) to add interface
> from the userland,
> can i able to call the br_ioctl (), br_ioctl_deviceless_stub () which
> is calling the static br_ioctl_deviceless () function, which is
> adding/deleting the interface from the
> bridge. But my doubt is they are not defined as static, am thought global scope,
> but no where exported those function symbols, so using directly into
> another module is correct way of usage?
> 

What you need to do is have a socket around and feed sock_ioctl()
the appropriate request.  Alternatively, you could simulate user call like
the code in 2.6 br_if.c does to fake ethtool:
	strncpy(ifr.ifr_name, dev->name, IFNAMSIZ);
	ifr.ifr_data = (void __user *) &ecmd;

	old_fs = get_fs();
	set_fs(KERNEL_DS);
	err = dev_ethtool(&ifr);
	set_fs(old_fs);
	
	if (!err) {

Easier to just do something call_usermodehelper or do it all from user mode.