netdev - Re: [PATCH net-next v6 7/8] net/funeth: add kTLS TX control part

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Date:   Wed, 16 Feb 2022 19:10:15 -0800
From:   Dimitris Michailidis <d.michailidis@...gible.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        Andrew Lunn <andrew@...n.ch>
Subject: Re: [PATCH net-next v6 7/8] net/funeth: add kTLS TX control part

On Wed, Jan 12, 2022 at 2:40 PM Jakub Kicinski <kuba@...nel.org> wrote:
>
> On Wed, 12 Jan 2022 14:35:32 -0800 Jakub Kicinski wrote:
> > > +   if (crypto_info->version == TLS_1_2_VERSION)
> > > +           req.version = FUN_KTLS_TLSV2;
> > > +   else if (crypto_info->version == TLS_1_3_VERSION)
> > > +           req.version = FUN_KTLS_TLSV3;
>
> I don't think offload of TLS 1.3 is supported by the kernel.
>
> > > +   else
> > > +           return -EOPNOTSUPP;
> > > +
> > > +   switch (crypto_info->cipher_type) {
> > > +   case TLS_CIPHER_AES_GCM_128: {
> > > +           struct tls12_crypto_info_aes_gcm_128 *c = (void *)crypto_info;
> > > +
> > > +           req.cipher = FUN_KTLS_CIPHER_AES_GCM_128;
> > > +           memcpy(req.key, c->key, sizeof(c->key));
> > > +           memcpy(req.iv, c->iv, sizeof(c->iv));
> > > +           memcpy(req.salt, c->salt, sizeof(c->salt));
> > > +           memcpy(req.record_seq, c->rec_seq, sizeof(c->rec_seq));
> > > +           break;
> > > +   }
>
> Neither are all the algos below. Please remove dead code.

I've removed the TLS 1.3 pieces and the non-offloaded 1.2 algos.

>
> > > +   case TLS_CIPHER_AES_GCM_256: {
> > > +           struct tls12_crypto_info_aes_gcm_256 *c = (void *)crypto_info;
> > > +
> > > +           req.cipher = FUN_KTLS_CIPHER_AES_GCM_256;
> > > +           memcpy(req.key, c->key, sizeof(c->key));
> > > +           memcpy(req.iv, c->iv, sizeof(c->iv));
> > > +           memcpy(req.salt, c->salt, sizeof(c->salt));
> > > +           memcpy(req.record_seq, c->rec_seq, sizeof(c->rec_seq));
> > > +           break;
> > > +   }
> > > +
> > > +   case TLS_CIPHER_CHACHA20_POLY1305: {
> > > +           struct tls12_crypto_info_chacha20_poly1305 *c;
> > > +
> > > +           c = (void *)crypto_info;
> > > +           req.cipher = FUN_KTLS_CIPHER_CHACHA20_POLY1305;
> > > +           memcpy(req.key, c->key, sizeof(c->key));
> > > +           memcpy(req.iv, c->iv, sizeof(c->iv));
> > > +           memcpy(req.salt, c->salt, sizeof(c->salt));
> > > +           memcpy(req.record_seq, c->rec_seq, sizeof(c->rec_seq));
> > > +           break;
> > > +   }