--- Begin Message ---
- To: Ravi K <kravi26@yahoo.com>
- Subject: Re: ioctl in kernel
- From: Nickolay Dokovsky <dokovsky@cs.utwente.nl>
- Date: Tue, 16 Oct 2001 12:05:01 +0200
- Organization: University of Twente
- References: <20011015212035.42550.qmail@web12306.mail.yahoo.com>
Ravi K wrote:
Hi,It Dosen't work because dev->do_ioctl is used only for device specific ioctls. When you try to invoke it with normal IOCTL it returns "not supported"
If you have the pointer to net_device (say *dev),
you can call dev->do_ioctl().-Ravi.
--- Nickolay Dokovsky <dokovsky@cs.utwente.nl> wrote:
> Hello,
> May you provide an example how to invoke ioctl on
> device from kernel
> module.
> For instance I have an dev pointer to struct
> net_device and I want to
> make SIOCSIFADDR on it from kernel module.
> Thank you
I saw that devinet_ioctl could be invoked wrapped in getting and setting segments call
like :
mm_segment_t. fs = get_fs();
set_fs(get_ds());
devinet_ioctl(SIOCSIFADDR,&ir);
{
it hangs here .... ????
}
set_fs(fs);
whitout fs functions devinet_ioctl returns "Bad_address" error generated by copy_from_user()
call that is in devinet_ioctl......All this is invoked from a kernel module which registrates network event listener and than invokes notifier_call when an NETDEVICE_GOINGDOWN is receieved.
The idea is when you have two NICs and one is going down than the other to obtain
MAC and IP addresses of the first.Thanks
N. Dokovsky
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