From patchwork Sun Oct 11 05:09:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Fastabend X-Patchwork-Id: 11830643 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7E10FC433DF for ; Sun, 11 Oct 2020 05:09:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 462C0221FE for ; Sun, 11 Oct 2020 05:09:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="HZztZDs5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726297AbgJKFJc (ORCPT ); Sun, 11 Oct 2020 01:09:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42190 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725882AbgJKFJc (ORCPT ); Sun, 11 Oct 2020 01:09:32 -0400 Received: from mail-il1-x144.google.com (mail-il1-x144.google.com [IPv6:2607:f8b0:4864:20::144]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F2DBAC0613CE; Sat, 10 Oct 2020 22:09:30 -0700 (PDT) Received: by mail-il1-x144.google.com with SMTP id p16so4476851ilq.5; Sat, 10 Oct 2020 22:09:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:from:to:cc:date:message-id:in-reply-to:references :user-agent:mime-version:content-transfer-encoding; bh=M0bAWQd0WTnt0/w1exFU5fB4VtkL954BS24rcnrY8NQ=; b=HZztZDs5YcwNqU2bB3eVr5AFfuZ4Pt1OcvT0Nz3SoyeybuJ5iy6Iw0Fr5RT2Bs2a13 BAWo86bb94BymR3ofGsINIbf4AJea6wVekvsnlstXebkaCSLuFNVG5IKlgL3aObQ/rX+ JbOV9VCi1OaCJ5vuuTNVymtSKfX0ySUkRo57a5Nn5JfgKdhPT3AgL795LSYv8Fi7UNsA jCphRMSBM7wcGu71pnWkdRk07MhwjL34VCo53DGmEZc3YJLXbRmJO4L2sj4xEQ6bvk5G HSaGQexB40npYOY7+hlKJ8BX6xdS4Y4EF8KbN+8hLJHleoqf3rP87x6Sqx+1on8L806C YIAQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:from:to:cc:date:message-id:in-reply-to :references:user-agent:mime-version:content-transfer-encoding; bh=M0bAWQd0WTnt0/w1exFU5fB4VtkL954BS24rcnrY8NQ=; b=GOtagEq8afdHCId4ZKrrKdrSc75PJINuTMfWb8csb90V1AxfedY1loHTkVvJS2qYVz plfX206mVrTkI35RWxTriNJk+nQm/6EDmC9uUTtyTwjp3njC9tXHjdkUgQFcqg1GNj/Z wCWiOC2g1M2gKvcP2UE4pIWI1tUQbBN9BxMAPv75rVeIvOwJwYm+/ETu3lph8+W5V6Br /+Z/sZCNNPshM5accyjPriKegUbIxw8YFGtBRorHeo9fDtyEDIY7XaCrGQtC51DrOErY cZhmGe5kL9m4tUFgjzefIagB7ldEfBG/yK8z139MVygtZlRAFx4upyqScX1a3TEmmfPM yuIA== X-Gm-Message-State: AOAM530hqJlupD/Bhi8B5tfcm4fJ+XCnM+J0ZANnUkZn7SvFVeMc9foe GdI4Qw642LDZY7imteaQtKI= X-Google-Smtp-Source: ABdhPJxFLLqI5JpScDfdY8gJPJHbdEt33oizOFZdqj3joaQoEmIjcPluZhWjgEy/kHsse5sC9mObhA== X-Received: by 2002:a92:6a06:: with SMTP id f6mr14759022ilc.53.1602392970406; Sat, 10 Oct 2020 22:09:30 -0700 (PDT) Received: from [127.0.1.1] ([184.63.162.180]) by smtp.gmail.com with ESMTPSA id e15sm6712209ili.75.2020.10.10.22.09.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 10 Oct 2020 22:09:29 -0700 (PDT) Subject: [bpf-next PATCH 1/4] bpf, sockmap: check skb_verdict and skb_parser programs explicitly From: John Fastabend To: john.fastabend@gmail.com, alexei.starovoitov@gmail.com, daniel@iogearbox.net Cc: netdev@vger.kernel.org, bpf@vger.kernel.org, jakub@cloudflare.com, lmb@cloudflare.com Date: Sat, 10 Oct 2020 22:09:07 -0700 Message-ID: <160239294756.8495.5796595770890272219.stgit@john-Precision-5820-Tower> In-Reply-To: <160239226775.8495.15389345509643354423.stgit@john-Precision-5820-Tower> References: <160239226775.8495.15389345509643354423.stgit@john-Precision-5820-Tower> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net We are about to allow skb_verdict to run without skb_parser programs as a first step change code to check each program type specifically. This should be a mechanical change without any impact to actual result. Signed-off-by: John Fastabend --- net/core/sock_map.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/net/core/sock_map.c b/net/core/sock_map.c index e83a80e8f13b..a2ed5b6223b9 100644 --- a/net/core/sock_map.c +++ b/net/core/sock_map.c @@ -230,16 +230,16 @@ static int sock_map_link(struct bpf_map *map, struct sk_psock_progs *progs, { struct bpf_prog *msg_parser, *skb_parser, *skb_verdict; struct sk_psock *psock; - bool skb_progs; int ret; skb_verdict = READ_ONCE(progs->skb_verdict); skb_parser = READ_ONCE(progs->skb_parser); - skb_progs = skb_parser && skb_verdict; - if (skb_progs) { + if (skb_verdict) { skb_verdict = bpf_prog_inc_not_zero(skb_verdict); if (IS_ERR(skb_verdict)) return PTR_ERR(skb_verdict); + } + if (skb_parser) { skb_parser = bpf_prog_inc_not_zero(skb_parser); if (IS_ERR(skb_parser)) { bpf_prog_put(skb_verdict); @@ -264,7 +264,8 @@ static int sock_map_link(struct bpf_map *map, struct sk_psock_progs *progs, if (psock) { if ((msg_parser && READ_ONCE(psock->progs.msg_parser)) || - (skb_progs && READ_ONCE(psock->progs.skb_parser))) { + (skb_parser && READ_ONCE(psock->progs.skb_parser)) || + (skb_verdict && READ_ONCE(psock->progs.skb_verdict))) { sk_psock_put(sk, psock); ret = -EBUSY; goto out_progs; @@ -285,7 +286,7 @@ static int sock_map_link(struct bpf_map *map, struct sk_psock_progs *progs, goto out_drop; write_lock_bh(&sk->sk_callback_lock); - if (skb_progs && !psock->parser.enabled) { + if (skb_parser && skb_verdict && !psock->parser.enabled) { ret = sk_psock_init_strp(sk, psock); if (ret) { write_unlock_bh(&sk->sk_callback_lock); @@ -303,10 +304,10 @@ static int sock_map_link(struct bpf_map *map, struct sk_psock_progs *progs, if (msg_parser) bpf_prog_put(msg_parser); out: - if (skb_progs) { + if (skb_verdict) bpf_prog_put(skb_verdict); + if (skb_parser) bpf_prog_put(skb_parser); - } return ret; }