Manage network links with hotplug?

Manage network links with hotplug?

[Joerg Sommer]

Hi,

is it possible to manage network links with hotplug. Is there a hotplug
event if the cable is pluged in the network card? Is would supersede
tools like ifplugd which poll the state of the network link.

Kind regards, Joerg.

-- 
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you're going too fast.'


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Re: Manage network links with hotplug?

[Marco d'Itri]

On Mar 21, Joerg Sommer <joerg@alea.gnuu.de> wrote:

> is it possible to manage network links with hotplug. Is there a hotplug
> event if the cable is pluged in the network card? Is would supersede
> tools like ifplugd which poll the state of the network link.
Yes, look at /etc/hotplug/net.agent.
The major problem is that there is no good way to assign an interface
name to a specific hardware device (but this happens also without
hotplug...).

-- 
ciao, |
Marco | [5218 coqCk7zBwtBZk]


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Re: Manage network links with hotplug?

[Greg KH]

On Sun, Mar 21, 2004 at 01:39:51PM +0100, Marco d'Itri wrote:
> On Mar 21, Joerg Sommer <joerg@alea.gnuu.de> wrote:
> 
> > is it possible to manage network links with hotplug. Is there a hotplug
> > event if the cable is pluged in the network card? Is would supersede
> > tools like ifplugd which poll the state of the network link.
> Yes, look at /etc/hotplug/net.agent.
> The major problem is that there is no good way to assign an interface
> name to a specific hardware device (but this happens also without
> hotplug...).

What is wrong with using nameif for this?

thanks,

greg k-h


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Re: Manage network links with hotplug?

[Marco d'Itri]

On Mar 22, Greg KH <greg@kroah.com> wrote:

> > The major problem is that there is no good way to assign an interface
> > name to a specific hardware device (but this happens also without
> > hotplug...).
> What is wrong with using nameif for this?
In my experience it just does not work: not all tools recognize the
modified names.
(I remember spending an afternoon swearing at it last year, maybe in
this time it has been improved? If there are limitations I don't
remember seeing them documented.)

-- 
ciao, |
Marco | [5241 scr/B96m1AdpQ]


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Re: Manage network links with hotplug?

[Greg KH]

On Mon, Mar 22, 2004 at 06:24:24PM +0100, Marco d'Itri wrote:
> On Mar 22, Greg KH <greg@kroah.com> wrote:
> 
> > > The major problem is that there is no good way to assign an interface
> > > name to a specific hardware device (but this happens also without
> > > hotplug...).
> > What is wrong with using nameif for this?
> In my experience it just does not work: not all tools recognize the
> modified names.

In my experience, and in Red Hat's and SuSE's experience, nameif works
just fine to bind network adapters to specific MAC address of devices.

As I personally know loads of people using it, and I know of some
developers working on adding some udev-like functions to nameif to
handle pci device names and stuff, I'm pretty sure this is the proper
tool.

thanks,

greg k-h


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Re: Manage network links with hotplug?

[Joerg Sommer]

begin  "Marco d'Itri" <md@Linux.IT> wrote:
> On Mar 21, Joerg Sommer <joerg@alea.gnuu.de> wrote:
>
>> is it possible to manage network links with hotplug. Is there a hotplug
>> event if the cable is pluged in the network card? Is would supersede
>> tools like ifplugd which poll the state of the network link.
> Yes, look at /etc/hotplug/net.agent.

But I don't get any hotplug event. I set export DEBUG=yes in
/sbin/hotplug, pulled out the network cable, waited a few seconds and
pluged it in, but I didn't get any message in /var/log/user.log and
nothing happend.

BTW: Why does hotplug log with facility user? It isn't an user
application. I would prefer daemon.

Jörg.
end.
-- 
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wahre Worte sind nie angenehm.


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Re: Manage network links with hotplug?

[Greg KH]

On Wed, Mar 24, 2004 at 11:53:55AM +0000, Joerg Sommer wrote:
> begin  "Marco d'Itri" <md@Linux.IT> wrote:
> > On Mar 21, Joerg Sommer <joerg@alea.gnuu.de> wrote:
> >
> >> is it possible to manage network links with hotplug. Is there a hotplug
> >> event if the cable is pluged in the network card? Is would supersede
> >> tools like ifplugd which poll the state of the network link.
> > Yes, look at /etc/hotplug/net.agent.
> 
> But I don't get any hotplug event. I set export DEBUG=yes in
> /sbin/hotplug, pulled out the network cable, waited a few seconds and
> pluged it in, but I didn't get any message in /var/log/user.log and
> nothing happend.

Oops, sorry, network cable events do not generate hotplug events.  I was
thinking of network device adds and removes.  You will have to use
ethtool or netlink to detect loss of the ethernet link.

Good luck,

greg k-h


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Re: Manage network links with hotplug?

[Gioele Barabucci]

On Thursday 25 March 2004 00:14, Greg KH wrote:
> Oops, sorry, network cable events do not generate hotplug events.  I was
> thinking of network device adds and removes.  You will have to use
> ethtool or netlink to detect loss of the ethernet link.
Why don't make the net drivers raise an hotplug event instead? this would be a 
cleaner design...

--
Gioele


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Re: Manage network links with hotplug?

[Greg KH]

On Thu, Mar 25, 2004 at 05:25:34PM +0100, Gioele Barabucci wrote:
> On Thursday 25 March 2004 00:14, Greg KH wrote:
> > Oops, sorry, network cable events do not generate hotplug events.  I was
> > thinking of network device adds and removes.  You will have to use
> > ethtool or netlink to detect loss of the ethernet link.
> Why don't make the net drivers raise an hotplug event instead? this would be a 
> cleaner design...

Go talk to the network driver authors :)

Good luck.

greg k-h


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