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SubjectRe: Network hardware: "Network Media Detection"
john slee wrote:
> On Sat, Nov 24, 2001 at 05:47:04PM -0800, H. Peter Anvin wrote:
> > > Hi
> > > I was wondering if there was any way in linux to use what redmond calls
> > > "Network Media Detection"?
> > This is basically taking the interface down when the link disappears
> > (and vice versa.) Rather useful for portable systems. Don't think
> > anyone has implemented it, but it should be easy enough to do.
> is there a common field in net_device{} for link state (not just up or
> down, but media type too)?
> all the various ethernet drivers seem to handle link changes rather
> differently. being able to notify userspace of media changes in a
> not-driver-specific manner would be nice as links flapping from 10 to
> 100Mbps and back often means problems are afoot.
> also i am undecided on _how_ to tell userspace about it... the current
> hotplug system only seems to handle plug/unplug, whereas this is a
> device state change and as such doesn't really fit the mould...

Functions provided by kernel that net drivers should be using:

ioctl that should be handled by net drivers, to provide link status to

Long term, we want to send a netlink message when link status changes.


Jeff Garzik | Only so many songs can be sung
Building 1024 | with two lips, two lungs, and one tongue.
MandrakeSoft | - nomeansno

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