From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 F0BBB3D5C31; Wed, 15 Jul 2026 21:41:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784151676; cv=none; b=FH0G6YLDcGWoYsHIYZ0AXOm+ywcU1tEn2KGHgMA4D4XFvrlb8X+QGhGEK+49CpQE8KFP9MD7zzEhLoeHrFUY7hvkF0Iz3DgPXzXqCS0vdlFRREWnymjNXo8a5tBGrSX3/JR9MGmN5bOLGQAeBsEAskP7Z1j4L0JdvQr8IdkDX7s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784151676; c=relaxed/simple; bh=BYdZv/CPin4C8t3qb/gbAUhhBukNpYFKrlk6563NaPM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=areJhFl9DNHUBShjG+tfH8cu7GVZQlh76HQM6iGmSxi3JuuNaesbjpTitVL06RhCC3ELjZuBRphHlHT6Gx/8CmYysHFns8SQQR4L/+oXfYo5QX0bVTF3L1Ry2brclTIJtioByWo8d1RJaevSYKW7vodQhKjH5v8mLjobgnLEzHk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Py81LRRk; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Py81LRRk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DC65C1F000E9; Wed, 15 Jul 2026 21:41:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784151671; bh=bIkDt9gNPr9rmPhQSmqDYoRsChKSWA+sElIKgpyPfrw=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=Py81LRRkBx10PB3NIkJdbuh0lWet18eXiuVIjgmoLoaNqS+LA//Bqx++4NQ7FSjFB ZDXSW63Ya0gXgwvkOP+u+LRs9UkyokmERHwRKg36DKd2tttofQ+LSopg2Lb7R3Jf8S /ysw6TGFfJbWNYwlIHNP98DBVXcgHyupMwW49tq5HebETN1IxV5/usYo16jB8EttUV 4R/gFKQvquExo4Gv+dYjNubTms9ibpv1CjIA7JluuUuw9qc8wlFFlB2K9vIXVcT9Ub 3qyixoZ3j0eZ+MWVM1JrRph3KoDr9/dkZmov/82XxTLeyJLNEDjbNY3hzDpKlfwV9R n6+SkjHIwF9ew== From: Lorenzo Bianconi Date: Wed, 15 Jul 2026 23:39:45 +0200 Subject: [PATCH bpf-next v5 5/8] selftests/bpf: add bpf_xdp_metadata_rx_checksum support to xdp_hw_metadat prog Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260715-bpf-xdp-meta-rxcksum-v5-5-623d5c0d0ab7@kernel.org> References: <20260715-bpf-xdp-meta-rxcksum-v5-0-623d5c0d0ab7@kernel.org> In-Reply-To: <20260715-bpf-xdp-meta-rxcksum-v5-0-623d5c0d0ab7@kernel.org> To: Donald Hunter , Jakub Kicinski , "David S. Miller" , Eric Dumazet , Paolo Abeni , Simon Horman , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Stanislav Fomichev , Andrew Lunn , Tony Nguyen , Przemek Kitszel , Alexander Lobakin , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , KP Singh , Hao Luo , Jiri Olsa , Shuah Khan , Maciej Fijalkowski , Jonathan Corbet , Shuah Khan , Kumar Kartikeya Dwivedi , Emil Tsalapatis Cc: Vladimir Vdovin , Jakub Sitnicki , netdev@vger.kernel.org, bpf@vger.kernel.org, intel-wired-lan@lists.osuosl.org, linux-kselftest@vger.kernel.org, linux-doc@vger.kernel.org, Aleksandr Loktionov , Lorenzo Bianconi X-Mailer: b4 0.14.3 Introduce the capability to dump HW rx checksum in xdp_hw_metadata program via bpf_xdp_metadata_rx_checksum() kfunc. Reviewed-by: Aleksandr Loktionov Signed-off-by: Lorenzo Bianconi --- .../testing/selftests/bpf/progs/xdp_hw_metadata.c | 7 +++++ tools/testing/selftests/bpf/xdp_hw_metadata.c | 31 ++++++++++++++++++++++ tools/testing/selftests/bpf/xdp_metadata.h | 12 ++++++--- 3 files changed, 46 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/bpf/progs/xdp_hw_metadata.c b/tools/testing/selftests/bpf/progs/xdp_hw_metadata.c index 330ece2eabdb..5eeadb7e27cf 100644 --- a/tools/testing/selftests/bpf/progs/xdp_hw_metadata.c +++ b/tools/testing/selftests/bpf/progs/xdp_hw_metadata.c @@ -110,6 +110,13 @@ int rx(struct xdp_md *ctx) else meta->hint_valid |= XDP_META_FIELD_VLAN_TAG; + err = bpf_xdp_metadata_rx_checksum(ctx, &meta->ip_summed, + &meta->cksum, &meta->cksum_level); + if (err) + meta->rx_cksum_err = err; + else + meta->hint_valid |= XDP_META_FIELD_CHECKSUM; + __sync_add_and_fetch(&pkts_redir, 1); return bpf_redirect_map(&xsk, ctx->rx_queue_index, XDP_PASS); } diff --git a/tools/testing/selftests/bpf/xdp_hw_metadata.c b/tools/testing/selftests/bpf/xdp_hw_metadata.c index 6db3b5555a22..c63a70a54075 100644 --- a/tools/testing/selftests/bpf/xdp_hw_metadata.c +++ b/tools/testing/selftests/bpf/xdp_hw_metadata.c @@ -8,6 +8,7 @@ * - Metadata verified: * - rx_timestamp * - rx_hash + * - rx_checksum * * TX: * - UDP 9091 packets trigger TX reply @@ -219,6 +220,30 @@ static void print_vlan_tci(__u16 tag) printf("PCP=%u, DEI=%d, VID=0x%X\n", pcp, dei, vlan_id); } +static void print_rx_cksum(__u8 ip_summed, __u32 cksum, __u8 cksum_level) +{ + const char *cksum_str; + + switch (ip_summed) { + case XDP_CHECKSUM_COMPLETE | XDP_CHECKSUM_UNNECESSARY: + cksum_str = "CHECKSUM_COMPLETE,CHECKSUM_UNNECESSARY"; + break; + case XDP_CHECKSUM_UNNECESSARY: + cksum_str = "CHECKSUM_UNNECESSARY"; + break; + case XDP_CHECKSUM_COMPLETE: + cksum_str = "CHECKSUM_COMPLETE"; + break; + case XDP_CHECKSUM_NONE: + default: + cksum_str = "CHECKSUM_NONE"; + break; + } + + printf("rx-cksum: %s, csum=0x%x, cksum_level=0x%x\n", + cksum_str, cksum, cksum_level); +} + static void verify_xdp_metadata(void *data, clockid_t clock_id) { struct xdp_meta *meta; @@ -254,6 +279,12 @@ static void verify_xdp_metadata(void *data, clockid_t clock_id) printf("No rx_vlan_tci or rx_vlan_proto, err=%d\n", meta->rx_vlan_tag_err); } + + if (meta->hint_valid & XDP_META_FIELD_CHECKSUM) + print_rx_cksum(meta->ip_summed, meta->cksum, + meta->cksum_level); + else + printf("No rx_cksum, err=%d\n", meta->rx_cksum_err); } static void verify_skb_metadata(int fd) diff --git a/tools/testing/selftests/bpf/xdp_metadata.h b/tools/testing/selftests/bpf/xdp_metadata.h index bca09b94af26..f864d4a8bd8c 100644 --- a/tools/testing/selftests/bpf/xdp_metadata.h +++ b/tools/testing/selftests/bpf/xdp_metadata.h @@ -28,6 +28,7 @@ enum xdp_meta_field { XDP_META_FIELD_TS = BIT(0), XDP_META_FIELD_RSS = BIT(1), XDP_META_FIELD_VLAN_TAG = BIT(2), + XDP_META_FIELD_CHECKSUM = BIT(3), }; #define XDP_CHECKSUM_NONE BIT(0) @@ -52,10 +53,13 @@ struct xdp_meta { }; __s32 rx_vlan_tag_err; }; - struct { - __u32 ip_summed; - __u32 cksum; - __u8 cksum_level; + union { + struct { + __u32 ip_summed; + __u32 cksum; + __u8 cksum_level; + }; + __s32 rx_cksum_err; }; enum xdp_meta_field hint_valid; }; -- 2.55.0