netdev - Re: add/delete VLANs programatically

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Message-ID: <b25312890809070358t6a4b7296x778c2de01412ab6e@mail.gmail.com>
Date:	Sun, 7 Sep 2008 13:58:20 +0300
From:	"Rami Rosen" <roszenrami@...il.com>
To:	"Eli Cohen" <eli@....mellanox.co.il>
Cc:	netdev@...r.kernel.org
Subject: Re: add/delete VLANs programatically

Hi,
  -It seems to me that it is possible.

  - If  you look at the ordinary way in which user space add/deletes
VLAN, you will see that this is performed by ioctls (SIOCSIFVLAN for
adding /removing with ADD_VLAN_CMD or DEL_VLAN_CMD).
- It is in performed by user space vconfig - VLAN (802.1q)
configuration program.

- When looking  at how these IOCTLs are handled in the kernel, you
will see that this is done by  vlan_ioctl_handler() in net/8021q/vlan.c.

 -If you look there, you will see that eventually adding a vlan is
done in the kernel by
register_vlan_device(net_device, VLAN ID);
end deleing a vlan is done in the kernel by calling
unregister_vlan_dev(net_device)

So it seems to me possible, though I did not try it.

Regards,
Rami Rosen




On Sun, Sep 7, 2008 at 10:12 AM, Eli Cohen <eli@....mellanox.co.il> wrote:
> Hi,
> I need to find a way to manipulate VLANs from a kernel module;
> specifically, I need to add and remove VLANs. Is that possible at all?
> How?
>
> Thanks,
> Eli
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