From: Daniel Borkmann Subject: Re: [PATCH v2 7/8] net: Rename TCA*BPF_DIGEST to ..._SHA256 Date: Wed, 11 Jan 2017 10:09:46 +0100 Message-ID: <5875F65A.4010904@iogearbox.net> References: <58758169.2020408@iogearbox.net> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Cc: Andy Lutomirski , Netdev , LKML , Linux Crypto Mailing List , "Jason A. Donenfeld" , Hannes Frederic Sowa , Alexei Starovoitov , Eric Dumazet , Eric Biggers , Tom Herbert , "David S. Miller" , Alexei Starovoitov To: Andy Lutomirski Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-crypto.vger.kernel.org Hi Andy, On 01/11/2017 04:11 AM, Andy Lutomirski wrote: > On Tue, Jan 10, 2017 at 4:50 PM, Daniel Borkmann wrote: >> On 01/11/2017 12:24 AM, Andy Lutomirski wrote: >>> >>> This makes it easier to add another digest algorithm down the road if >>> needed. It also serves to force any programs that might have been >>> written against a kernel that had the old field name to notice the >>> change and make any necessary changes. >>> >>> This shouldn't violate any stable API policies, as no released kernel >>> has ever had TCA*BPF_DIGEST. >> >> Imho, this and patch 6/8 is not really needed. Should there ever >> another digest alg be used (doubt it), then you'd need a new nl >> attribute and fdinfo line anyway to keep existing stuff intact. >> Nobody made the claim that you can just change this underneath >> and not respecting abi for existing applications when I read from >> above that such apps now will get "forced" to notice a change. > > Fair enough. I was more concerned about prerelease iproute2 versions, > but maybe that's a nonissue. I'll drop these two patches. Ok. Sleeping over this a bit, how about a general rename into "prog_tag" for fdinfo and TCA_BPF_TAG resp. TCA_ACT_BPF_TAG for the netlink attributes, fwiw, it might reduce any assumptions on this being made? If this would be preferable, I could cook that patch against -net for renaming it? Thanks, Daniel