HW VLAN Filtering on FreeBSD 6.3 + 7.0
pyunyh at gmail.com
Sun Nov 16 16:36:13 PST 2008
On Sun, Nov 16, 2008 at 02:27:36PM +0200, Yony Yossef wrote:
> > > I would like to enable my NIC HW VLAN filtering, is there any way for
> > my
> > > driver to access the OS vlan table? (something like vlan_group_get_device
> > on
> > > linux)
> > >
> > > I understood from previous investigation that on FreeBSD 6.3 and 7.0
> > there's
> > > no ioctl informing the driver of vlan addition/removal. Is that correct?
> > Man pages to check out: vlan(4) and ifconfig(8). I'm pretty sure the
> > vlan tagging feature is per-driver.
> > Also, the vlan(4) list of supported drivers is out of date (for example,
> > em(4) is missing), so be sure to check the man page of your NIC driver.
> Sorry, i explained myself pretty bad. I'm working on an Ethernet driver for
> The VLAN hw tagging is already working properly, but my nic is capable of
> holding a vlan table on hw, filtering vlans on it's own.
> I need to find a way to update that hw table.
> one way is to recieve a ioctl from the OS of it's vlan table event (add,
> remove). I can't find such ioctl.
FreeBSD doesn't use ioctl to manipulate VLAN HW table.
> second is to have a direct access from the driver to the OS vlan table. I'm
> not familiar with the interface or if it's possible at all, and that is my
> actual question.
See EVENT_HANDLER(9) and igb(4) for working example.
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