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 D68A8A40642 for ; Mon, 27 Nov 2023 20:03:41 +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=BckS2jNn Received: by mail-pl1-x649.google.com with SMTP id d9443c01a7336-1cfd28e289dso12139455ad.3 for ; Mon, 27 Nov 2023 11:03:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1701111820; x=1701716620; 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=RPaN4vg9SQDJHqYebN2/xKdXNgaWBfzTAU2wIw8MN1M=; b=BckS2jNng9r80U3vbb5g8UyYynWtFJQhpjal7eTgDRmxqbbKfBp+SXtZUxSWAGQPaY yNhqyUb2Il3NescnuhmtuNf9h67ei2h64tDmHwZS0DDIh8LxNX3HeRfBftDwW81nOX4i Uuk5BlEzZcKAYP1bI1ma0D+RaSYG87kG/Lm8O2uIde3bT+jebD3m44vEDt3i1sYTt7xD H80RGfzQA8zDMBAxcy2fQjxu5gjbB1pP4rgCoXyMtuSQI096+Q9uD0RnD1477i4yuni+ JQgH8WUFAGXiyyOKrfNkzqf7hPnYYVFMkydO9jVHsIyAo2Inqo4W3QbjZe5gdBah95PR 43wg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701111820; x=1701716620; 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=RPaN4vg9SQDJHqYebN2/xKdXNgaWBfzTAU2wIw8MN1M=; b=D8mXdp4ZdAZqIheOBQnub9AyhtZviT9udycD3LSRWjtOOuKxgdnSzY3v1KSMPkE2Fh d8ZR7sxVDsALTQ8/tB+CtoMNycSMdIMcQGu1AD8iWBB+QKTuCoT5qV1rKSvcgOztcxsh GZpeyVFkhS9PKIuNnCQdvSk9GB2LfIULeg/p0r0GZnFpLjUXco7316qyGyHfj/sqo3sX nQ67m42LHWguWZrjAIjHx8vrzEdricYRDkflisvwpToNo50btPKVtkzJcRa0enMDSdSb pIXH8zGMAiOSb9p5BhN8zKdZCl+xc55z2ftxmcMu7UMDk5cowIEx+b3qVI4QI8tl+y2x Jsdw== X-Gm-Message-State: AOJu0YwMeyt0BSOLi+Kw9enCFp4usV2+QyRNucL646GYLfsCI6nOkE8o HeAw9XqhUT07SSd1ilBybrqMBPQ= X-Google-Smtp-Source: AGHT+IFBTjrElYjTEV9WQEofymDfgw7+CwNBeZf4OoRmbs32unp/IJ0ulmfxZYSw4cDD/GY5fzng/uo= X-Received: from sdf.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5935]) (user=sdf job=sendgmr) by 2002:a17:902:b948:b0:1cc:cc77:94ed with SMTP id h8-20020a170902b94800b001cccc7794edmr2695776pls.10.1701111819885; Mon, 27 Nov 2023 11:03:39 -0800 (PST) Date: Mon, 27 Nov 2023 11:03:16 -0800 In-Reply-To: <20231127190319.1190813-1-sdf@google.com> Mime-Version: 1.0 References: <20231127190319.1190813-1-sdf@google.com> X-Mailer: git-send-email 2.43.0.rc1.413.gea7ed67945-goog Message-ID: <20231127190319.1190813-11-sdf@google.com> From: Stanislav Fomichev To: bpf@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Message-ID-Hash: BGJKICIB4ECU44FZCHSEXETRL2GYPJEM X-Message-ID-Hash: BGJKICIB4ECU44FZCHSEXETRL2GYPJEM X-MailFrom: 3C-hkZQMKCaASDFGOOGLE.COMXDP-HINTSXDP-PROJECT.NET@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 v6 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 -- 2.43.0.rc1.413.gea7ed67945-goog