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Re: Re: How to get Ethernet link status?
- From: Gary Thomas <gary at mlbassoc dot com>
- To: Kelvin Lawson <news at kibosh dot org>
- Cc: ecos-discuss at sources dot redhat dot com
- Date: Wed, 17 Dec 2008 10:46:34 -0700
- Subject: Re: [ECOS] Re: How to get Ethernet link status?
- References: <gi8pv9$udq$1@ger.gmane.org> <gibddk$eu$1@ger.gmane.org>
Kelvin Lawson wrote:
> Hi Grant,
>
>> What is the official method used to get the link status of an
>> interface (up/down, 10/100/1000, full/half duplex)?
>>
>> I don't see any hooks in the Ethernet driver API. Are drivers
>> supposed to export that info as global variables somehow? Are
>> they supposed to provide a global function to call?
>
> A standard way of doing this would be to use the ioctl SIOCGETIFMEDIA,
> and check the IFM_AVALID and IFM_ACTIVE flags in the IFM status returned.
>
> We did this by adding a new query "ETH_DRV_GET_MEDIA_STATUS" in the
> ethernet driver control function (xxx_control()) and adding support for
> SIOCGIFMEDIA in eth_drv_ioctl().
Can you share this code? It's probably worth putting into
the mainline.
--
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Gary Thomas | Consulting for the
MLB Associates | Embedded world
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