linux-kernel - Re: Driver writer hints (was [PATCH 3/4] Add ETHTOOL

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Message-ID: <46BCD223.6020304@hp.com>
Date:	Fri, 10 Aug 2007 14:01:23 -0700
From:	Rick Jones <rick.jones2@...com>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	netdev@...r.kernel.org, davem@...emloft.net,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Driver writer hints (was [PATCH 3/4] Add ETHTOOL_[GS]PFLAGS	sub-ioctls)

> If we are getting (retrieving) flags:
> 
>     3) Userland issues ETHTOOL_GPFLAGS, to obtain a 32-bit bitmap
> 
>     4) Userland prints out a tag returned from ETHTOOL_GSTRINGS
>        for each bit set to one in the bitmap.  If a bit is set,
>        but there is no string to describe it, that bit is ignored.
>        (i.e. a list of 5 strings is returned, but bit 24 is set)

Is that to enable "hidden" bits?  If not I'd think that emitting some 
sort of "UNKNOWN_FLAG" might help flush-out little oopses like 
forgetting a string.

rick jones

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