netdev - Re: the future of ethtool

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Message-ID: <20101116062553.GD24292@canuck.infradead.org>
Date:	Tue, 16 Nov 2010 01:25:53 -0500
From:	Thomas Graf <tgraf@...radead.org>
To:	Ben Hutchings <bhutchings@...arflare.com>
Cc:	Jeff Garzik <jeff@...zik.org>,
	Stephen Hemminger <shemminger@...tta.com>,
	NetDev <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>
Subject: Re: the future of ethtool

On Tue, Nov 16, 2010 at 12:10:30AM +0000, Ben Hutchings wrote:
> I would expect to treat each operation in a multiple-set as conditional
> on the success of all previous operations.  ethtool or other utilities
> should then take care to put operations in a sensible order (e.g. enable
> TX checksum before TSO, if those remain separate operations).  Error
> reporting in the core is then as simple as reporting how many operations
> were successful plus the error code for the one that failed.

This is already not that trivial with current netlink limitations.
We are pretty much limited to a single int when returning error
states. One more reason to rethink current netlink error semantics.
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