From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-x649.google.com (mail-pl1-x649.google.com [IPv6:2607:f8b0:4864:20::649]) by mail.toke.dk (Postfix) with ESMTPS id 2E5C9A39782 for ; Thu, 2 Nov 2023 23:59:58 +0100 (CET) Authentication-Results: mail.toke.dk; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20230601 header.b=b0JRgSkE Received: by mail-pl1-x649.google.com with SMTP id d9443c01a7336-1cc5ef7e815so11808375ad.3 for ; Thu, 02 Nov 2023 15:59:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1698965936; x=1699570736; darn=xdp-project.net; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=+IGkzuCjLv5zFnRniqT4SWqZjcb9N4mGztS9ZvMTe5s=; b=b0JRgSkEac0Qa88G/T0+4NGXi/g6ssizufF7EFWF/N9Nh0YOhguOjMU4xq33LALMAU jrql773Z6mOUlS1XtG3oPzstGXuCxIvNrlfuZOQj1v7KeLOKodYo7JDo11aUK8WJJr59 lk47W4nUEsQPz/nPAL0nJiQtifV/Zr3t9qD4g6HSCYT++Pzsjd+OuZJrSpYxljeb24TF 9351Wh0kuxRcDZTNIrKSvIra+d4/4vabnVFc4OvNVSUXWfDFULZZdGgmxX/YdkhAMMaQ uiZdUJg2UlbcIaj9spI6qituCKV7VJXrLxGi7aQzKMI4AmSvDpqfyXRQlsq8QTurM/ub 4sEQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698965936; x=1699570736; 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=+IGkzuCjLv5zFnRniqT4SWqZjcb9N4mGztS9ZvMTe5s=; b=fvt2yoRBX0KbK7OjEVUP2xvuu0UVsDjky1vYPcP63sD23795/ZrkqViBodBOTHJW6k 9TI2IMNgg3AAjD8rxat/RXGd1l2AKQ8XVR7iR9WEe2XfzP2vEm2aH8Pwip7Y4qkglJZf l4Yj2CeamMQZeh8UNB/vA0tEg2pxBWrB0wPzyMGFeFv3PcgwnkqeKsk6bsqt4MWqhmKn ZazJtvwv99stbjV6CPNwxkA1uXVt+nTOTSlDY+zFzT6pdxas9bh2ipuVV/QbOEifcT9P T+rJhV6hK28KXjGZGQWgU/h7ScxfVDkmhRgJGYVLj6Z6m0RK4Yhg/Ku7/3nZ7fK0/29W u0qw== X-Gm-Message-State: AOJu0YyxmlR9bZ8dWV724sz/WuSM40YTcvN74n/whhqNNKvlBGkusP87 42PQ0fNULmmaGHV+r+vRlFEvD7U= X-Google-Smtp-Source: AGHT+IH6Wxf2G64tR0jzO3T+h2cnip19vyYFp36oRClwsoNM0OizspJXCj9yuO9CV3dzDnbjyYHxgsQ= X-Received: from sdf.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5935]) (user=sdf job=sendgmr) by 2002:a17:902:ac8e:b0:1cc:30cf:eae6 with SMTP id h14-20020a170902ac8e00b001cc30cfeae6mr305364plr.10.1698965936662; Thu, 02 Nov 2023 15:58:56 -0700 (PDT) Date: Thu, 2 Nov 2023 15:58:34 -0700 In-Reply-To: <20231102225837.1141915-1-sdf@google.com> Mime-Version: 1.0 References: <20231102225837.1141915-1-sdf@google.com> X-Mailer: git-send-email 2.42.0.869.gea05f2083d-goog Message-ID: <20231102225837.1141915-11-sdf@google.com> From: Stanislav Fomichev To: bpf@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Message-ID-Hash: WUADAI6YGHHYDBZM4J4JF2SR2OQW5Z2I X-Message-ID-Hash: WUADAI6YGHHYDBZM4J4JF2SR2OQW5Z2I X-MailFrom: 3sClEZQMKCUUzkmnvvnsl.jvt4kw-opu0z4kw-wyvqlj0.ul0@flex--sdf.bounces.google.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header 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, yoong.siang.song@intel.com, netdev@vger.kernel.org, xdp-hints@xdp-project.net X-Mailman-Version: 3.3.8 Precedence: list Subject: [xdp-hints] [PATCH bpf-next v5 10/13] selftests/bpf: Add csum helpers List-Id: XDP hardware hints design discussion Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: 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 34f1200a781b..94b9be24e39b 100644 --- a/tools/testing/selftests/bpf/network_helpers.h +++ b/tools/testing/selftests/bpf/network_helpers.h @@ -71,4 +71,47 @@ 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 -- 2.42.0.869.gea05f2083d-goog