netdev - Re: [v3 PATCH 0/8] crypto: Convert all AEAD users to new interface

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Message-ID: <20150527083911.GA27432@gondor.apana.org.au>
Date:	Wed, 27 May 2015 16:39:11 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Johannes Berg <johannes@...solutions.net>
Cc:	Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
	netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	Marcel Holtmann <marcel@...tmann.org>,
	Steffen Klassert <steffen.klassert@...unet.com>,
	Stephan Mueller <smueller@...onox.de>
Subject: Re: [v3 PATCH 0/8] crypto: Convert all AEAD users to new interface

On Wed, May 27, 2015 at 10:15:50AM +0200, Johannes Berg wrote:
> 
> Do you think it'd be feasible at all to somehow override the
> aead_request_set_crypt() and aead_request_set_ad() functions or so to do
> something that works on older kernels (and thus older crypto subsystems)
> or do you think I just shouldn't bother looking at that and just add
> ifdefs to "undo" your changes in this series on older kernels?

Another option is to backport the new interface to the older kernel.

You only need something like

https://patchwork.kernel.org/patch/6452601/

for the older kernel to support the new interface along with the
old interface.

Note that this patch itself won't be good enough because I have since
removed cryptoff.  But it illustrates the amount of code you need.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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