link up and down

link up and down

[ratheesh k]

I have hotplug2 on my 2.6.22 kernel ... I would like to get  ethernet
plug in and  plug out events .

wen i googled , i didnt find anything ...is there any way ????

i am getting ethernet interface up and down messages ..but i want ,
ethernet cable plug in and plug out messages in userspace .


Thanks,
Ratheesh

Re: link up and down

[Greg KH]

On Tue, Aug 11, 2009 at 10:05:49PM +0530, ratheesh k wrote:
> I have hotplug2 on my 2.6.22 kernel ... I would like to get  ethernet
> plug in and  plug out events .

Use ethtool, it provides this information.

good luck,

greg k-h

Re: link up and down

[Marco d'Itri]

On Aug 11, ratheesh k <ratheesh.ksz@gmail.com> wrote:

> the linux kernel is running on an embedded box ... so if i can achieve
> this using hotplug2 , i can save a lot of flash by not intstalling
> ethtool ..
> is there any way
No.

-- 
ciao,
Marco

Re: link up and down

[ratheesh k]

the linux kernel is running on an embedded box ... so if i can achieve
this using hotplug2 , i can save a lot of flash by not intstalling
ethtool ..
is there any way

On Tue, Aug 11, 2009 at 10:22 PM, Greg KH<greg@kroah.com> wrote:
> On Tue, Aug 11, 2009 at 10:05:49PM +0530, ratheesh k wrote:
>> I have hotplug2 on my 2.6.22 kernel ... I would like to get  ethernet
>> plug in and  plug out events .
>
> Use ethtool, it provides this information.
>
> good luck,
>
> greg k-h
>

Re: link up and down

[Greg KH]

On Tue, Aug 11, 2009 at 10:51:47PM +0530, ratheesh k wrote:
> the linux kernel is running on an embedded box ... so if i can achieve
> this using hotplug2 , i can save a lot of flash by not intstalling
> ethtool ..
> is there any way

You are really using hotplug2 for a device?  Are you insane?  That's
very old, unsupported, and buggy code that was a totally bad idea when I
wrote it.

Please do not use it, it will break and cause bad things to happen.

And no, there are no hotplug events for link up/down, use ethtool like
it is designed for.

thanks,

greg k-h

Re: link up and down

[Marcel Holtmann]

Hi Greg,

> > the linux kernel is running on an embedded box ... so if i can achieve
> > this using hotplug2 , i can save a lot of flash by not intstalling
> > ethtool ..
> > is there any way
> 
> You are really using hotplug2 for a device?  Are you insane?  That's
> very old, unsupported, and buggy code that was a totally bad idea when I
> wrote it.
> 
> Please do not use it, it will break and cause bad things to happen.
> 
> And no, there are no hotplug events for link up/down, use ethtool like
> it is designed for.

actually there was a patch for KOBJ_CHANGE events when network interface
flags change, but it never got merged upstream.

Also just using RTNL and listening for IFF_LOWER_UP is way simpler than
going through uevents.

Regards

Marcel

Re: link up and down

[Stephen Hemminger]

On Tue, 11 Aug 2009 15:17:47 -0700
Marcel Holtmann <marcel@holtmann.org> wrote:

> Hi Greg,
> 
> > > the linux kernel is running on an embedded box ... so if i can achieve
> > > this using hotplug2 , i can save a lot of flash by not intstalling
> > > ethtool ..
> > > is there any way
> > 
> > You are really using hotplug2 for a device?  Are you insane?  That's
> > very old, unsupported, and buggy code that was a totally bad idea when I
> > wrote it.
> > 
> > Please do not use it, it will break and cause bad things to happen.
> > 
> > And no, there are no hotplug events for link up/down, use ethtool like
> > it is designed for.
> 
> actually there was a patch for KOBJ_CHANGE events when network interface
> flags change, but it never got merged upstream.
> 
> Also just using RTNL and listening for IFF_LOWER_UP is way simpler than
> going through uevents.

Have you looked at netplugd?

Re: link up and down

[ratheesh k]

i wrote a code using netlink socket to listen  events ...... Since i
am integrating all in an embedded device , it will be good if i can
achieve the same with hotplug ... Thanks a lot ..



On Wed, Aug 12, 2009 at 11:50 PM, Stephen
Hemminger<shemminger@linux-foundation.org> wrote:
> On Tue, 11 Aug 2009 15:17:47 -0700
> Marcel Holtmann <marcel@holtmann.org> wrote:
>
>> Hi Greg,
>>
>> > > the linux kernel is running on an embedded box ... so if i can achieve
>> > > this using hotplug2 , i can save a lot of flash by not intstalling
>> > > ethtool ..
>> > > is there any way
>> >
>> > You are really using hotplug2 for a device?  Are you insane?  That's
>> > very old, unsupported, and buggy code that was a totally bad idea when I
>> > wrote it.
>> >
>> > Please do not use it, it will break and cause bad things to happen.
>> >
>> > And no, there are no hotplug events for link up/down, use ethtool like
>> > it is designed for.
>>
>> actually there was a patch for KOBJ_CHANGE events when network interface
>> flags change, but it never got merged upstream.
>>
>> Also just using RTNL and listening for IFF_LOWER_UP is way simpler than
>> going through uevents.
>
> Have you looked at netplugd?
>
> --
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