netdev - Re: [PATCH v8 01/26] tcp: authopt: Initial support and key management

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Message-ID: <9bb98d13313d2ebeb5804d67285e8e6320ce4e74.camel@redhat.com>
Date:   Thu, 08 Sep 2022 08:35:55 +0200
From:   Paolo Abeni <pabeni@...hat.com>
To:     Leonard Crestez <cdleonard@...il.com>,
        David Ahern <dsahern@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Dmitry Safonov <0x7f454c46@...il.com>
Cc:     Francesco Ruggeri <fruggeri@...sta.com>,
        Salam Noureddine <noureddine@...sta.com>,
        Philip Paeps <philip@...uble.is>,
        Shuah Khan <shuah@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Kuniyuki Iwashima <kuniyu@...zon.co.jp>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        Jakub Kicinski <kuba@...nel.org>,
        Yuchung Cheng <ycheng@...gle.com>,
        Mat Martineau <mathew.j.martineau@...ux.intel.com>,
        Christoph Paasch <cpaasch@...le.com>,
        Ivan Delalande <colona@...sta.com>,
        Caowangbao <caowangbao@...wei.com>,
        Priyaranjan Jha <priyarjha@...gle.com>, netdev@...r.kernel.org,
        linux-crypto@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 01/26] tcp: authopt: Initial support and key
 management

On Mon, 2022-09-05 at 10:05 +0300, Leonard Crestez wrote:
[...]
> diff --git a/net/ipv4/tcp_authopt.c b/net/ipv4/tcp_authopt.c
> new file mode 100644
> index 000000000000..d38e9c89c89d
> --- /dev/null
> +++ b/net/ipv4/tcp_authopt.c
> @@ -0,0 +1,317 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +
> +#include <net/tcp_authopt.h>
> +#include <net/ipv6.h>
> +#include <net/tcp.h>
> +#include <linux/kref.h>
> +
> +/* This is enabled when first struct tcp_authopt_info is allocated and never released */
> +DEFINE_STATIC_KEY_FALSE(tcp_authopt_needed_key);
> +EXPORT_SYMBOL(tcp_authopt_needed_key);
> +
> +static inline struct netns_tcp_authopt *sock_net_tcp_authopt(const struct sock *sk)
> +{
> +	return &sock_net(sk)->tcp_authopt;
> +}

Please have a look at PW report for this series, there are a bunch of
issues to be addressed, e.g. above 'static inline' should be just
'static'


> +
> +static void tcp_authopt_key_release_kref(struct kref *ref)
> +{
> +	struct tcp_authopt_key_info *key = container_of(ref, struct tcp_authopt_key_info, ref);
> +
> +	kfree_rcu(key, rcu);
> +}
> +
> +static void tcp_authopt_key_put(struct tcp_authopt_key_info *key)
> +{
> +	if (key)
> +		kref_put(&key->ref, tcp_authopt_key_release_kref);
> +}
> +
> +static void tcp_authopt_key_del(struct netns_tcp_authopt *net,
> +				struct tcp_authopt_key_info *key)
> +{
> +	lockdep_assert_held(&net->mutex);
> +	hlist_del_rcu(&key->node);
> +	key->flags |= TCP_AUTHOPT_KEY_DEL;
> +	kref_put(&key->ref, tcp_authopt_key_release_kref);
> +}
> +
> +/* Free info and keys.
> + * Don't touch tp->authopt_info, it might not even be assigned yes.
> + */
> +void tcp_authopt_free(struct sock *sk, struct tcp_authopt_info *info)

this need to be 'static'.

I'm sorry to bring the next topic this late (If already discussed, I
missed that point), is possible to split this series in smaller chunks?


Cheers,

Paolo