From patchwork Tue Jul 30 02:12:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Safonov via B4 Relay X-Patchwork-Id: 815502 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 89F782A1C7; Tue, 30 Jul 2024 02:13:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722305609; cv=none; b=GTpjjKZHt0aqINPRBCcvbssrSgHupqgvAzCwivRLiscgbTDadOShP+fXdmDGGe92MGDAyov2GDFi88f7RdHH9k01B7AU33RoLZDv3Naw9xCrrCTmAi10f+5hON0ncgVzZNrd45iYh0e4SG3Fu3BU2+58X01OBjTdIbpxaB+Dfe0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722305609; c=relaxed/simple; bh=eT7i2g1f0cqiBayr0fps7NZWteEXD2+sswiVQeadjT0=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=hY9mMoj7dFanpm71Q+ndxqcxlu63Y4XH//3y6J4m8j8amfvjmRtax0ZGqnl0HenXm7dvibvzYE3si3tGS19ClVKXQpjlThmQUmnCLPdeWR+PEDi5e7sL1rj+68unCJokN+hPp/rfqKq2wRz/YQpeZB2RK+LwdKheR436rXtY50g= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EANiDsCK; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="EANiDsCK" Received: by smtp.kernel.org (Postfix) with ESMTPS id 644B1C32786; Tue, 30 Jul 2024 02:13:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722305609; bh=eT7i2g1f0cqiBayr0fps7NZWteEXD2+sswiVQeadjT0=; h=From:Subject:Date:To:Cc:Reply-To:From; b=EANiDsCKCwN1BcfKnnPKFzk+A4oASxkcYKAW7mzo0rcnO7fDKg3rX6+j8Ssk7PAJn jt695q6tVpueSXIkti40bvOJvDqqnZlPHKP7T2hY0D3yLVmnFJBMkqlmK5ttfv77KE 5oPmrOYHorl9B3xGzr1/7g+NMA2F+ZEOYxX9wTNmT3yUdbKJgGos3Zk9kMbGPevo/f pefASRurRmrbcCV9I1wlhy2Wn1mwGyqWpgK/COaze44pBaxCa9awUHtbOW6zPlFeEp E3Umy4PeNh5mMmfuyvlp360uvuEhAVW/fy8lMRGrfcp9S0KfRYF/bdh4w5JcEAnVc5 /853aQw/Of0Sw== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4CFF4C3DA61; Tue, 30 Jul 2024 02:13:29 +0000 (UTC) From: Dmitry Safonov via B4 Relay Subject: [PATCH net-next 0/7] net/selftests: TCP-AO selftests updates Date: Tue, 30 Jul 2024 03:12:14 +0100 Message-Id: <20240730-tcp-ao-selftests-upd-6-12-v1-0-ffd4bf15d638@gmail.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAP5LqGYC/zWMQQrCMBAAv1L27GKaRAt+RTykycYu6LZkoxRK/ 24UPA7DzAZKhUnh0m1Q6M3KszToDx3EKcidkFNjsMZ6MziDNS4YZlR65EpaFV9LwjP2Fn1ydHJ h8NllaP1SKPP6e19BqKLQWuHWzBiUcCxB4vR9/93xGVhg3z+pIXEblQAAAA== To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Shuah Khan Cc: Mohammad Nassiri , netdev@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Dmitry Safonov <0x7f454c46@gmail.com> X-Mailer: b4 0.14.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1722305607; l=4552; i=0x7f454c46@gmail.com; s=20240410; h=from:subject:message-id; bh=eT7i2g1f0cqiBayr0fps7NZWteEXD2+sswiVQeadjT0=; b=W8S01ZXd8hQdRgKdXK/TejkLDTeSThgq+hIMh9IPKnziRno0w9cYPY4pY4U4byFp3tRMz9+us vbc/rEvyDRaCZt6zP49ico7JsdOU5n5ZD0C3GxLy4wd5EmP+04PnIIo X-Developer-Key: i=0x7f454c46@gmail.com; a=ed25519; pk=cFSWovqtkx0HrT5O9jFCEC/Cef4DY8a2FPeqP4THeZQ= X-Endpoint-Received: by B4 Relay for 0x7f454c46@gmail.com/20240410 with auth_id=152 X-Original-From: Dmitry Safonov <0x7f454c46@gmail.com> Reply-To: 0x7f454c46@gmail.com First 4 patches are more-or-less cleanups/preparations. Patch 5 was sent to me/contributed off-list by Mohammad, who wants 32-bit kernels to run TCP-AO. Patch 6 is a workaround/fix for slow VMs. Albeit, I can't reproduce the issue, but I hope it will fix netdev flakes for connect-deny-* tests. And the biggest change is adding TCP-AO tracepoints to selftests. I think it's a good addition by the following reasons: - The related tracepoints are now tested; - It allows tcp-ao selftests to raise expectations on the kernel behavior - up from the syscalls exit statuses + net counters. - Provides tracepoints usage samples. As tracepoints are not a stable ABI, any kernel changes done to them will be reflected to the selftests, which also will allow users to see how to change their code. It's quite better than parsing dmesg (what BGP was doing pre-tracepoints, ugh). Somewhat arguably, the code parses trace_pipe, rather than uses libtraceevent (which any sane user should do). The reason behind that is the same as for rt-netlink macros instead of libmnl: I'm trying to minimize the library dependencies of the selftests. And the performance of formatting text in kernel and parsing it again in a test is not critical. Current output sample: > ok 73 Trace events matched expectations: 13 tcp_hash_md5_required[2] tcp_hash_md5_unexpected[4] tcp_hash_ao_required[3] tcp_ao_key_not_found[4] Previously, tracepoints selftests were part of kernel tcp tracepoints submission [1], but since then the code was quite changed: - Now generic tracing setup is in lib/ftrace.c, separate from lib/ftrace-tcp.c which utilizes TCP trace points. This separation allows future selftests to trace non-TCP events, i.e. to find out an skb's drop reason, which was useful in the creation of TCP-CLOSE stress-test (not in this patch set, but used in attempt to reproduce the issue from [2]). - Another change is that in the previous submission the trace events where used only to detect unexpected TCP-AO/TCP-MD5 events. In this version the selftests will fail if an expected trace event didn't appear. Let's see how reliable this is on the netdev bot - it obviously passes on my testing, but potentially may require a temporary XFAIL patch if it misbehaves on a slow VM. [1] https://lore.kernel.org/lkml/20240224-tcp-ao-tracepoints-v1-0-15f31b7f30a7@arista.com/ [2] https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=33700a0c9b56 Signed-off-by: Dmitry Safonov <0x7f454c46@gmail.com> --- Dmitry Safonov (6): selftests/net: Clean-up double assignment selftests/net: Provide test_snprintf() helper selftests/net: Be consistent in kconfig checks selftests/net: Don't forget to close nsfd after switch_save_ns() selftests/net: Synchronize client/server before counters checks selftests/net: Add trace events matching to tcp_ao Mohammad Nassiri (1): selftests/tcp_ao: Fix printing format for uint64_t tools/testing/selftests/net/tcp_ao/Makefile | 3 +- tools/testing/selftests/net/tcp_ao/bench-lookups.c | 2 +- tools/testing/selftests/net/tcp_ao/config | 1 + tools/testing/selftests/net/tcp_ao/connect-deny.c | 25 +- tools/testing/selftests/net/tcp_ao/connect.c | 6 +- tools/testing/selftests/net/tcp_ao/icmps-discard.c | 2 +- .../testing/selftests/net/tcp_ao/key-management.c | 18 +- tools/testing/selftests/net/tcp_ao/lib/aolib.h | 173 ++++++- .../testing/selftests/net/tcp_ao/lib/ftrace-tcp.c | 549 +++++++++++++++++++++ tools/testing/selftests/net/tcp_ao/lib/ftrace.c | 466 +++++++++++++++++ tools/testing/selftests/net/tcp_ao/lib/kconfig.c | 31 +- tools/testing/selftests/net/tcp_ao/lib/setup.c | 15 +- tools/testing/selftests/net/tcp_ao/lib/sock.c | 1 - tools/testing/selftests/net/tcp_ao/lib/utils.c | 26 + tools/testing/selftests/net/tcp_ao/restore.c | 30 +- tools/testing/selftests/net/tcp_ao/rst.c | 2 +- tools/testing/selftests/net/tcp_ao/self-connect.c | 19 +- tools/testing/selftests/net/tcp_ao/seq-ext.c | 28 +- .../selftests/net/tcp_ao/setsockopt-closed.c | 6 +- tools/testing/selftests/net/tcp_ao/unsigned-md5.c | 35 +- 20 files changed, 1374 insertions(+), 64 deletions(-) --- base-commit: 1722389b0d863056d78287a120a1d6cadb8d4f7b change-id: 20240730-tcp-ao-selftests-upd-6-12-4d3e53a74f3f Best regards,