From patchwork Thu Oct 27 20:43:14 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Safonov X-Patchwork-Id: 619318 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 22070FA3747 for ; Thu, 27 Oct 2022 20:44:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236685AbiJ0UoG (ORCPT ); Thu, 27 Oct 2022 16:44:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58898 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236684AbiJ0UoB (ORCPT ); Thu, 27 Oct 2022 16:44:01 -0400 Received: from mail-wr1-x42e.google.com (mail-wr1-x42e.google.com [IPv6:2a00:1450:4864:20::42e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 230E5659C3 for ; Thu, 27 Oct 2022 13:44:01 -0700 (PDT) Received: by mail-wr1-x42e.google.com with SMTP id a14so4172847wru.5 for ; Thu, 27 Oct 2022 13:44:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=arista.com; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=mqJckVrQg7Ntll0dZ6IL+1cA9p9Fyu8BflY8RBnW50o=; b=adksfXU+IhKWZkTCsv/Jcv4ToprOrvbwTBksLrI9oR+mVHGGcv2M+bzWDg6c3Ei0LL YIDu6kSyWeVF1gxECYDffcL+Gm66Tiow7qbitsojkjI6rNtCXi8rjSgDZ/7GYuGQ29Ga bdHtqQrdJqgNW5QLmAjWCqndg+pHDaCwhajmklTkWp46KOZb720UmH6+b6mrPcP5tUlS vmh1nXjO5l26AiTBzQDW43ew8nwJ3kObZfz8tYr9oFNv2FC6V8Eu/daou6yxzUY5ImYb De2OexjjNkF1d7lW4nu9vveS3ONmHaH8CSus/o+4VGJbqmOoae7gTjO8NmsyJa7AsERN skJw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=mqJckVrQg7Ntll0dZ6IL+1cA9p9Fyu8BflY8RBnW50o=; b=BydZAKiXNNffk9f+9RcUkLKzzbJ1T6+85pGXXOXmc3mYYFeMRVOp+/S9x63vQ3wS+C QmPFZXLD/Z7o7kYQwx7nkJTxHZ6dHaBF/QYCy0dSsliHBZ6qDYbxpOGl9w5RqIYQbUWF ClEkhewuuNWNycKoJxIaZNyNXQpe2U5NpWqfRonYaZPo+VWsXFsveB7/NbGffWP7TXVH dIKF8Q8/vNOHXJ+E/9P8H9p1Ke2Etc+JL3ELR/5DNyHvraWgKjGESV9V+4MIEhvVNTaJ JEhHGJSVqEIPLPYHmaNIqCNg/PT71dqrpsDfLarGC1e4UTU7Ys/nyNQxXr/eiFO5EG9Z kefg== X-Gm-Message-State: ACrzQf1uBEtDx92CYZ4ebCAenjwgsXSy9yW4s46A5uB9jtsw4FO09lpF 1zqGN1sTybmDZyR9hXyERk/1nw== X-Google-Smtp-Source: AMsMyM7ufBiXSUdy6XA2PSxE6SbX0e3VGqoCT3nF6lUpJF9Ii1Vt9YuHAtQ+Zj0E3hZOb8dRT0BRiw== X-Received: by 2002:adf:f98a:0:b0:236:677c:2407 with SMTP id f10-20020adff98a000000b00236677c2407mr17998847wrr.578.1666903439683; Thu, 27 Oct 2022 13:43:59 -0700 (PDT) Received: from Mindolluin.ire.aristanetworks.com ([217.173.96.166]) by smtp.gmail.com with ESMTPSA id n3-20020a5d6b83000000b00236644228besm1968739wrx.40.2022.10.27.13.43.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Oct 2022 13:43:59 -0700 (PDT) From: Dmitry Safonov To: linux-kernel@vger.kernel.org, David Ahern , Eric Dumazet Cc: Dmitry Safonov , Andy Lutomirski , Ard Biesheuvel , Bob Gilligan , Dan Carpenter , "David S. Miller" , Dmitry Safonov <0x7f454c46@gmail.com>, Eric Biggers , "Eric W. Biederman" , Francesco Ruggeri , Herbert Xu , Hideaki YOSHIFUJI , Ivan Delalande , Jakub Kicinski , Leonard Crestez , Paolo Abeni , Salam Noureddine , Shuah Khan , netdev@vger.kernel.org, linux-crypto@vger.kernel.org Subject: [PATCH v3 03/36] net/tcp: Separate tcp_md5sig_info allocation into tcp_md5sig_info_add() Date: Thu, 27 Oct 2022 21:43:14 +0100 Message-Id: <20221027204347.529913-4-dima@arista.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221027204347.529913-1-dima@arista.com> References: <20221027204347.529913-1-dima@arista.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Add a helper to allocate tcp_md5sig_info, that will help later to do/allocate things when info allocated, once per socket. Signed-off-by: Dmitry Safonov --- net/ipv4/tcp_ipv4.c | 30 +++++++++++++++++++++--------- 1 file changed, 21 insertions(+), 9 deletions(-) diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 87d440f47a70..fae80b1a1796 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -1172,6 +1172,24 @@ struct tcp_md5sig_key *tcp_v4_md5_lookup(const struct sock *sk, } EXPORT_SYMBOL(tcp_v4_md5_lookup); +static int tcp_md5sig_info_add(struct sock *sk, gfp_t gfp) +{ + struct tcp_sock *tp = tcp_sk(sk); + struct tcp_md5sig_info *md5sig; + + if (rcu_dereference_protected(tp->md5sig_info, lockdep_sock_is_held(sk))) + return 0; + + md5sig = kmalloc(sizeof(*md5sig), gfp); + if (!md5sig) + return -ENOMEM; + + sk_gso_disable(sk); + INIT_HLIST_HEAD(&md5sig->head); + rcu_assign_pointer(tp->md5sig_info, md5sig); + return 0; +} + /* This can be called on a newly created socket, from other files */ int tcp_md5_do_add(struct sock *sk, const union tcp_md5_addr *addr, int family, u8 prefixlen, int l3index, u8 flags, @@ -1202,17 +1220,11 @@ int tcp_md5_do_add(struct sock *sk, const union tcp_md5_addr *addr, return 0; } + if (tcp_md5sig_info_add(sk, gfp)) + return -ENOMEM; + md5sig = rcu_dereference_protected(tp->md5sig_info, lockdep_sock_is_held(sk)); - if (!md5sig) { - md5sig = kmalloc(sizeof(*md5sig), gfp); - if (!md5sig) - return -ENOMEM; - - sk_gso_disable(sk); - INIT_HLIST_HEAD(&md5sig->head); - rcu_assign_pointer(tp->md5sig_info, md5sig); - } key = sock_kmalloc(sk, sizeof(*key), gfp | __GFP_ZERO); if (!key)