From patchwork Mon Jul 24 23:59:55 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanislav Fomichev X-Patchwork-Id: 13325437 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D2C1D156DF for ; Tue, 25 Jul 2023 00:00:12 +0000 (UTC) Received: from mail-yw1-x1149.google.com (mail-yw1-x1149.google.com [IPv6:2607:f8b0:4864:20::1149]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DDC821732 for ; Mon, 24 Jul 2023 17:00:11 -0700 (PDT) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-5734d919156so49071477b3.3 for ; Mon, 24 Jul 2023 17:00:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1690243211; x=1690848011; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=j0xCHxAGKShVCxci31z5oM/FwnvfCpkAI53IOFmhMP4=; b=iEUUWQTZEiKO/M6CzAyb7NJ1+iN4XGynsPwh213pq4B1/X4QekZtkIplANkA4Ws4EL 7oX9jnWsgMXtdyFoRe77XuoUGClQceYg03IB2ESt88lxzMt8xOy2a56LAOSmfSypwr4w rRsqOq0ziPWbMDQF9J3iHRieHYNbPkkNqq/hoazKVzevlLV52hoONAr9TQ3lRAa7HFJA stUn6AWKB0CbOVUmEejhKGy/rpyWgx3ZeDcYq4zQcdAD693bUrs26CzbfS9Mv4jMGPMr 7ApjMaecLegto10DRwvAC5RNo+1lTD/SlRRytkOGewHUrRkvvKoees2S19GaHmt1LvQL Aayw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690243211; x=1690848011; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=j0xCHxAGKShVCxci31z5oM/FwnvfCpkAI53IOFmhMP4=; b=c6IZlaGVe90dtaK/d0+Lj0ZuhsZA0ARO3T4iTcdjNNIcA1mBmbtPizNQNuV5xtoWwt UnjE//j02fHi9qP9VE1Ze9mdJIO+HIje5UXhqUdXueke+tAKEAkafvvtnjEF0aNjsU+B rFdZxIg3rdGF8d/VF02haujqh2A21T4rwakXV0Xa2Hnsh2vsVSjJMzcAYFxL5v9BLIyw q0bobhcvtG9SKJmpQ3C2CfGntQqWatuNOmsmHLfM6B6D/CqdnWepJj8P4rkCuBSZ5Tgr j++tn449w/EXm9+zBKWc7bVfUCBtaCh86jBFMj+urQ78ENAELx6zJssq1EYM75GCggVx UUyg== X-Gm-Message-State: ABy/qLYVZ8ZXDD9H+f2Ux53IDkF8nCfaxUmn5mU72ehRIkkbwpUp21QV CSXx6jQp1/5+d92k8ibtyc0u7PjHCLfFIyI59s2wkZVd3h6WPWqbd9+qfg7/9w9OTbXfgFNeHGV qEkcnZW5IQzXNFEJYOHHDYdIv0MyICzoPgj9iI/akz2jtJTlG5g== X-Google-Smtp-Source: APBJJlEgxr/axKa6jbuffaWm0GOh8TggDPXk67nc+YfYvbSh3OyokwhpRZY+YAjRzvWJ2vov0tNpeGY= X-Received: from sdf.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5935]) (user=sdf job=sendgmr) by 2002:a81:af21:0:b0:56c:e585:8b17 with SMTP id n33-20020a81af21000000b0056ce5858b17mr75742ywh.5.1690243210706; Mon, 24 Jul 2023 17:00:10 -0700 (PDT) Date: Mon, 24 Jul 2023 16:59:55 -0700 In-Reply-To: <20230724235957.1953861-1-sdf@google.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20230724235957.1953861-1-sdf@google.com> X-Mailer: git-send-email 2.41.0.487.g6d72f3e995-goog Message-ID: <20230724235957.1953861-7-sdf@google.com> Subject: [RFC net-next v4 6/8] selftests/bpf: Add csum helpers From: Stanislav Fomichev To: bpf@vger.kernel.org Cc: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, martin.lau@linux.dev, song@kernel.org, yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org, sdf@google.com, haoluo@google.com, jolsa@kernel.org, kuba@kernel.org, toke@kernel.org, willemb@google.com, dsahern@kernel.org, magnus.karlsson@intel.com, bjorn@kernel.org, maciej.fijalkowski@intel.com, hawk@kernel.org, netdev@vger.kernel.org, xdp-hints@xdp-project.net X-Spam-Status: No, score=-9.6 required=5.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE,USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: kuba@kernel.org X-Patchwork-State: RFC Checksum helpers will be used to calculate pseudo-header checksum in AF_XDP metadata selftests. The helpers are mirroring existing kernel ones: - csum_tcpudp_magic : IPv4 pseudo header csum - csum_ipv6_magic : IPv6 pseudo header csum - csum_fold : fold csum and do one's complement Signed-off-by: Stanislav Fomichev --- tools/testing/selftests/bpf/network_helpers.h | 43 +++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/tools/testing/selftests/bpf/network_helpers.h b/tools/testing/selftests/bpf/network_helpers.h index 694185644da6..d749757a36a3 100644 --- a/tools/testing/selftests/bpf/network_helpers.h +++ b/tools/testing/selftests/bpf/network_helpers.h @@ -67,4 +67,47 @@ struct nstoken; */ struct nstoken *open_netns(const char *name); void close_netns(struct nstoken *token); + +static __u16 csum_fold(__u32 csum) +{ + csum = (csum & 0xffff) + (csum >> 16); + csum = (csum & 0xffff) + (csum >> 16); + + return (__u16)~csum; +} + +static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr, + __u32 len, __u8 proto, + __wsum csum) +{ + __u64 s = csum; + + s += (__u32)saddr; + s += (__u32)daddr; + s += htons(proto + len); + s = (s & 0xffffffff) + (s >> 32); + s = (s & 0xffffffff) + (s >> 32); + + return csum_fold((__u32)s); +} + +static inline __sum16 csum_ipv6_magic(const struct in6_addr *saddr, + const struct in6_addr *daddr, + __u32 len, __u8 proto, + __wsum csum) +{ + __u64 s = csum; + int i; + + for (i = 0; i < 4; i++) + s += (__u32)saddr->s6_addr32[i]; + for (i = 0; i < 4; i++) + s += (__u32)daddr->s6_addr32[i]; + s += htons(proto + len); + s = (s & 0xffffffff) + (s >> 32); + s = (s & 0xffffffff) + (s >> 32); + + return csum_fold((__u32)s); +} + #endif