From patchwork Mon Jun 28 23:00:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Toke_H=C3=B8iland-J=C3=B8rgensen?= X-Patchwork-Id: 468612 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 D4E5AC11F66 for ; Mon, 28 Jun 2021 23:01:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B11DF61CF8 for ; Mon, 28 Jun 2021 23:01:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236208AbhF1XDi (ORCPT ); Mon, 28 Jun 2021 19:03:38 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:36874 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235313AbhF1XDf (ORCPT ); Mon, 28 Jun 2021 19:03:35 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1624921269; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=wET16Z+BojG4tjaqWO4XLxsxQNkC9SqpExUXVqFNB/Y=; b=Um4/V7d07wIP9/cvoE1GB5eooJw35vgVyjhApnCquN05LAvx4Mqtbx+FmFvAc/kNee9Wur owp/sYILmHd2lAg6DxeQoWEH7cJK9B+IwwYnffN0V1qDNvHRm4urLQ8CFD7eCn6TyjINc+ yxnds9gjhQt/kcuK6P4KSleryU7Hj/8= Received: from mail-ed1-f72.google.com (mail-ed1-f72.google.com [209.85.208.72]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-544-1SugnKfmPe-njhiO0l8Wnw-1; Mon, 28 Jun 2021 19:01:08 -0400 X-MC-Unique: 1SugnKfmPe-njhiO0l8Wnw-1 Received: by mail-ed1-f72.google.com with SMTP id p13-20020a05640210cdb029039560ff6f46so2825476edu.17 for ; Mon, 28 Jun 2021 16:01:07 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=wET16Z+BojG4tjaqWO4XLxsxQNkC9SqpExUXVqFNB/Y=; b=m3uvsCuyXwLmgQDMU5NHdRYNnz+R0YtU23yiAzJ/hCtpbUFAIySkIoAofz8tahMC9H /muj3Q1Y6iAf9EeUkG6Cbl7EhcMvaoKq+L2NPj+s9WIaxprYt91HTiXPEryPFxJ8HQDQ UlCdZZTcEJT8tDk6UYSDRGtwXscOnfzCtOWicKmWWDAHE8wnwBL2cXafstCjFLJ07sG6 nITvQmRiQwYAld6iJey5f0Ltz0VF73ckISNY50fb9+/PeW9kw48pWo8OSL/M5y917un/ qdB90hQA/LHXkUdfTPGUMiweIYEHsKRJ7cxJkI/jD4LWq42TnJGKskAhFtdfelOgXnfN Vu+w== X-Gm-Message-State: AOAM530QhNQkRwJtZ+jQA9Hf5KoyZQh0Xwp3OuORC5/WNtAyuWvu2YtC GdJ1X1hT3QRqRpCucwdsmH9cIo+A/tBF+hXcmLK2u+BK8NUSd5gV00rrWJJFXTiZUqg2slAKedF Fcc+by3wqiJ78weKR X-Received: by 2002:a05:6402:4243:: with SMTP id g3mr18788276edb.118.1624921266971; Mon, 28 Jun 2021 16:01:06 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwOkhovZmeE6X4ovlHzS0eNaA0YXEDY/lSgliR+5z8ViDbIlcWecWw/i/RKdJoqWe8GOiDYuw== X-Received: by 2002:a05:6402:4243:: with SMTP id g3mr18788244edb.118.1624921266707; Mon, 28 Jun 2021 16:01:06 -0700 (PDT) Received: from alrua-x1.borgediget.toke.dk ([45.145.92.2]) by smtp.gmail.com with ESMTPSA id z28sm7165024ejl.69.2021.06.28.16.01.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Jun 2021 16:01:05 -0700 (PDT) Received: by alrua-x1.borgediget.toke.dk (Postfix, from userid 1000) id 280AE18071E; Tue, 29 Jun 2021 01:01:03 +0200 (CEST) From: =?utf-8?q?Toke_H=C3=B8iland-J=C3=B8rgensen?= To: bpf@vger.kernel.org, netdev@vger.kernel.org Cc: Martin KaFai Lau , Hangbin Liu , Jesper Dangaard Brouer , Magnus Karlsson , "Paul E . McKenney" , Jakub Kicinski , =?utf-8?q?Toke_H=C3=B8iland-?= =?utf-8?q?J=C3=B8rgensen?= , kernel test robot Subject: [PATCH bpf-next] bpf/devmap: convert remaining READ_ONCE() to rcu_dereference() Date: Tue, 29 Jun 2021 01:00:51 +0200 Message-Id: <20210628230051.556099-1-toke@redhat.com> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org There were a couple of READ_ONCE()-invocations left-over by the devmap RCU conversion. Convert these to rcu_dereference() as well to avoid complaints from sparse. Fixes: 782347b6bcad ("xdp: Add proper __rcu annotations to redirect map entries") Reported-by: kernel test robot Signed-off-by: Toke Høiland-Jørgensen --- kernel/bpf/devmap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/bpf/devmap.c b/kernel/bpf/devmap.c index 2f6bd75cd682..7a0c008f751b 100644 --- a/kernel/bpf/devmap.c +++ b/kernel/bpf/devmap.c @@ -558,7 +558,7 @@ int dev_map_enqueue_multi(struct xdp_buff *xdp, struct net_device *dev_rx, if (map->map_type == BPF_MAP_TYPE_DEVMAP) { for (i = 0; i < map->max_entries; i++) { - dst = READ_ONCE(dtab->netdev_map[i]); + dst = rcu_dereference(dtab->netdev_map[i]); if (!is_valid_dst(dst, xdp, exclude_ifindex)) continue; @@ -654,7 +654,7 @@ int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb, if (map->map_type == BPF_MAP_TYPE_DEVMAP) { for (i = 0; i < map->max_entries; i++) { - dst = READ_ONCE(dtab->netdev_map[i]); + dst = rcu_dereference(dtab->netdev_map[i]); if (!dst || dst->dev->ifindex == exclude_ifindex) continue;