/sys: Network device status: link; Hard disks?

/sys: Network device status: link; Hard disks?

[Nico Schottelius]

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Hello everybody!

Will /sys provide details about link status of network cards
and can I also find out what devices are harddisks?

Like having /sys/block/hda/type, which contains "cd-rom" or
"harddisk" or similar. 

Or having something like /sys/class/net/eth0/link with 0/1 setting?

I know some or all information can be retrieved somehow differnt
(like using /proc), but shouldn't those be found in /sys?

Just some question on how we can use /sys useful.

Greetings,

Nico

PS: Please CC, I am not subscribed.

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Re: /sys: Network device status: link; Hard disks?

[Jesper Juhl]

On Wed, 22 Sep 2004, Nico Schottelius wrote:

> Date: Wed, 22 Sep 2004 16:16:30 +0200
> From: Nico Schottelius <nico-kernel@schottelius.org>
> To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
> Subject: /sys: Network device status: link; Hard disks?
> 
> Hello everybody!
> Will /sys provide details about link status of network cards
> and can I also find out what devices are harddisks?
> Like having /sys/block/hda/type, which contains "cd-rom" or
> "harddisk" or similar. 
> Or having something like /sys/class/net/eth0/link with 0/1 setting?
> I know some or all information can be retrieved somehow differnt
> (like using /proc), but shouldn't those be found in /sys?
> Just some question on how we can use /sys useful.
> Greetings,
> Nico
> PS: Please CC, I am not subscribed.
> 

Hmm, sounds nice to me. I don't know if something like 
/sys/class/net/eth0/link as you describe it would be accepted, but I've 
been wanting to play with sysfs for a while and this sounds like a nice 
and resonably simple little project, I will take a shot at trying to 
implement that.


--
Jesper Juhl

Re: /sys: Network device status: link; Hard disks?

[Nico Schottelius]

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Jesper Juhl [Wed, Sep 22, 2004 at 04:19:06PM +0200]:
> On Wed, 22 Sep 2004, Nico Schottelius wrote:
> 
> > Date: Wed, 22 Sep 2004 16:16:30 +0200
> > From: Nico Schottelius <nico-kernel@schottelius.org>
> > To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
> > Subject: /sys: Network device status: link; Hard disks?
> > 
> > Hello everybody!
> > Will /sys provide details about link status of network cards
> > and can I also find out what devices are harddisks?
> > Like having /sys/block/hda/type, which contains "cd-rom" or
> > "harddisk" or similar. 
> > Or having something like /sys/class/net/eth0/link with 0/1 setting?
> > I know some or all information can be retrieved somehow differnt
> > (like using /proc), but shouldn't those be found in /sys?
> > Just some question on how we can use /sys useful.
> > Greetings,
> > Nico
> > PS: Please CC, I am not subscribed.
> > 
> 
> Hmm, sounds nice to me. I don't know if something like 
> /sys/class/net/eth0/link as you describe it would be accepted, but I've 
> been wanting to play with sysfs for a while and this sounds like a nice 
> and resonably simple little project, I will take a shot at trying to 
> implement that.

Perhaps there is a even a default method for network
device drivers to show their link status, but I don't know where
and having it in /sys seems senseful to me.

Anyway, is this the wrong list to ask questions about /sys or
where can I find information about what the sense of /sys is and
what it should and will contain?

Greetings,

Nico
-- 
Keep it simple & stupid, use what's available.
Please use pgp encryption: 8D0E 27A4 is my id.
http://nico.schotteli.us | http://linux.schottelius.org

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Re: /sys: Network device status: link; Hard disks?

[Stephen Hemminger]

You probably just want to expose the state of netif_carrier_ok (and netif_running).
Doing it in net-sysfs.c is trivial.  I was hoping someone else would learn something
and do it for me.

Re: /sys: Network device status: link; Hard disks?

[Jesper Juhl]

On Wed, 22 Sep 2004, Stephen Hemminger wrote:

> Date: Wed, 22 Sep 2004 15:30:28 -0700
> From: Stephen Hemminger <shemminger@osdl.org>
> To: linux-kernel@vger.kernel.org
> Subject: Re: /sys: Network device status: link; Hard disks?
> 
> You probably just want to expose the state of netif_carrier_ok (and netif_running).
> Doing it in net-sysfs.c is trivial.  I was hoping someone else would learn something
> and do it for me.

That is exactely what I've started to do, but it's taking me a little 
while since I have limited time and have to learn about sysfs first. But 
it's a nice learning experience and I'll post a patch as soon as I have 
something that works resonably, but it might take me a few days.


--
Jesper Juhl