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From: Elena Petrova <lenaptr@google.com>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Eric Biggers <ebiggers@kernel.org>,
	"open list:HARDWARE RANDOM NUMBER GENERATOR CORE" 
	<linux-crypto@vger.kernel.org>,
	Stephan Mueller <smueller@chronox.de>,
	Ard Biesheuvel <ardb@kernel.org>,
	Jeffrey Vander Stoep <jeffv@google.com>
Subject: Re: [PATCH v5] crypto: af_alg - add extra parameters for DRBG interface
Date: Tue, 8 Sep 2020 18:23:25 +0100
Message-ID: <CABvBcwYqeGw-9oGngEm01dAt8JLxkKCLFFn9409efcLPTsJg+w@mail.gmail.com> (raw)
In-Reply-To: <20200821042443.GA25695@gondor.apana.org.au>

On Fri, 21 Aug 2020 at 05:24, Herbert Xu <herbert@gondor.apana.org.au> wrote:
>
> Eric Biggers <ebiggers@kernel.org> wrote:
> >
> > Since proto_ops are almost identical, and only one is used in a given kernel
> > build, why not just do:
> >
> > static struct proto_ops algif_rng_ops = {
> >        ...
> > #ifdef CONFIG_CRYPTO_USER_API_RNG_CAVP
> >        .sendmsg        = rng_sendmsg,
> > #else
> >        .sendmsg        = sock_no_sendmsg,
> > #endif
> >        ...
> > };
> >
> > Similarly for .recvmsg(), although I don't understand what's wrong with just
> > adding the lock_sock() instead...  The RNG algorithms do locking anyway, so it's
> > not like that would regress the ability to recvmsg() in parallel.  Also,
> > conditional locking depending on the kernel config makes it more difficult to
> > find kernel bugs like deadlocks.
>
> I want this to have minimal impact on anyone who's not using it.
> After all, this is something that only Google is asking for.
>
> Anyway, I wasn't looking for a compile-time ops switch, but a
> run-time one.
>
> I think what we can do is move the new newsock->ops assignment
> in af_alg_accept up above the type->accept call which would then
> allow it to be overridden by the accept call.
>
> After that you could just change newsock->ops depending on whether
> pctx->entropy is NULL or not in rng_accept_parent.

Ack, done in v6.

> As for the proto_ops duplication I don't think it's that big a
> deal, but if you're really bothered just create a macro for the
> identical bits in the struct.

I didn't create a macro to avoid complicating the code.

Thanks,
Elena

  parent reply index

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-13 16:48 [PATCH 0/1] " Elena Petrova
2020-07-13 16:48 ` [PATCH 1/1] " Elena Petrova
2020-07-13 17:10   ` Eric Biggers
2020-07-16 14:23     ` Elena Petrova
2020-07-16 16:40       ` [PATCH v2] " Elena Petrova
2020-07-20 17:35         ` Stephan Mueller
2020-07-21 12:55           ` Elena Petrova
2020-07-21 13:18             ` Stephan Mueller
2020-07-28 16:16               ` Elena Petrova
2020-07-20 17:42         ` Stephan Müller
2020-07-22 15:59         ` Eric Biggers
2020-07-28 15:51           ` [PATCH v3] " Elena Petrova
2020-07-28 17:36             ` Eric Biggers
2020-07-29 15:45               ` [PATCH v4] " Elena Petrova
2020-07-29 19:26                 ` Stephan Müller
2020-07-31  7:23                 ` Herbert Xu
2020-08-03 14:48                   ` Elena Petrova
2020-08-03 15:10                     ` Stephan Mueller
2020-08-03 15:30                       ` Elena Petrova
2020-08-04  2:18                     ` Herbert Xu
2020-07-13 17:25   ` [PATCH 1/1] " Eric Biggers
2020-07-31  7:26     ` Herbert Xu
2020-08-13 16:00       ` Elena Petrova
2020-08-13 16:01         ` [PATCH v4] " Elena Petrova
2020-08-13 16:04           ` Elena Petrova
2020-08-13 16:08             ` [PATCH v5] " Elena Petrova
2020-08-13 19:32               ` Eric Biggers
2020-08-21  4:24                 ` Herbert Xu
2020-09-08 17:04                   ` [PATCH v6] " Elena Petrova
2020-09-09  4:35                     ` Eric Biggers
2020-09-09 18:29                       ` [PATCH v7] " Elena Petrova
2020-09-09 21:00                         ` Eric Biggers
2020-09-16 11:07                           ` [PATCH v8] " Elena Petrova
2020-09-18  6:43                             ` Herbert Xu
2020-09-18 15:42                               ` [PATCH v9] " Elena Petrova
2020-09-25  8:16                                 ` Herbert Xu
2020-09-08 17:23                   ` Elena Petrova [this message]
2020-09-08 17:18                 ` [PATCH v5] " Elena Petrova
2020-07-14  5:17 ` [PATCH 0/1] " Stephan Mueller
2020-07-14 15:23   ` Elena Petrova
2020-07-14 15:34     ` Stephan Mueller
2020-07-16 14:41       ` Elena Petrova
2020-07-16 14:49         ` Stephan Mueller
2020-07-16 14:59           ` Stephan Mueller

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