From patchwork Mon Jul 29 08:20:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Alexis_Lothor=C3=A9?= X-Patchwork-Id: 815514 Received: from relay3-d.mail.gandi.net (relay3-d.mail.gandi.net [217.70.183.195]) (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 9CB8E13B293; Mon, 29 Jul 2024 08:20:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.195 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722241250; cv=none; b=mWN1ibFpl+WQaciZyzgYQB7brWoPTPyXiO0pbBE2csbdEWTid+EVgbAe5fDiWJbU6N9CvwEOJGpjwiJMwG6rn8OqbvWtP1/anykmgosyOUBq+Hud8joSX3B3EiT5VjwKnfSvKdtoRuWmoA7wUAutKOHPuFmiPxz8OHDWq3EgCSA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722241250; c=relaxed/simple; bh=gWoeHDWBYkw/Cf56KlItPlCKBTInWP9tVziNZNVhVCU=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=oDgPhU146vVq9/4vxz8RWrVlPkjQwvjhjESDQ8rVigg4xJm2fGUoln35Vi5jJD2WcXuxPaVkrgtEznSvSng5KcM7fqCAIkhhJQubipiX9Ir5prq335xwahCgeUU3/6tOXrk8lnYib9C9pBEYTtpVh3CqEkY5jBlgcxGQQzCjPd0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=NS3YyOZC; arc=none smtp.client-ip=217.70.183.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="NS3YyOZC" Received: by mail.gandi.net (Postfix) with ESMTPSA id 780B36000D; Mon, 29 Jul 2024 08:20:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1722241239; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=4fFVFGlNlnhAQFPV1Z/aOZg6AK32ftL61u05vs63M2Q=; b=NS3YyOZCFEM4bt1F94deQta+9coiy50AP9gFL20P+aGsCP5EI4TJZrRfJN8FL+QyBEvNam gMmPySqvhhZNQQgs7p3PtrZ9I5rX9YDaBQfmSZsPdWJHX8ha6T7eMZdTjWLZlTSx8GZ8SC jInwIguj0sx8hdLk3LmBuBYHVotKbuf1PiBhLQ76qSnud63ymAxw++Y0hC99X/wA/dfHHd 4dbF8hVRMdjaWRGVzGlP4KTMtThOXe2orfbLr3o3LxiZqKmP3CUELxnz4tnVCtkqITOCYj ZyCKO7Z+dg3Q6PLrdOm4HCAWsnQ5RqtQfcPgI33rsnanaWE72mEjoXOAtlNUUA== From: =?utf-8?q?Alexis_Lothor=C3=A9_=28eBPF_Foundation=29?= Subject: [PATCH bpf-next v2 0/3] selftests/bpf: convert test_dev_cgroup to test_progs Date: Mon, 29 Jul 2024 10:20:28 +0200 Message-Id: <20240729-convert_dev_cgroup-v2-0-4c1fc0520545@bootlin.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=H4sIAMxQp2YC/22NwQqDMBAFf0X23JQYU5We/I8iYjarBtpEkjRYx H9vkB57HIY3b4dA3lCAe7GDp2SCcTaDuBSAy2hnYkZnBsGF5I2oGDqbyMdBUxpw9u69slrWUnF dNVM5Qh6uniazndEHqHVilrYIfTaLCdH5z/mWytP/wrd/4VQyzgS2qLRsG5SyU87Fp7FXdC/oj +P4AsPyG8jAAAAA To: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Mykola Lysenko , Shuah Khan Cc: ebpf@linuxfoundation.org, Thomas Petazzoni , bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, =?utf-8?q?A?= =?utf-8?q?lexis_Lothor=C3=A9_=28eBPF_Foundation=29?= X-Mailer: b4 0.14.1 X-GND-Sasl: alexis.lothore@bootlin.com Hello, this small series aims to integrate test_dev_cgroup in test_progs so it could be run automatically in CI. The new version brings a few differences with the current one: - test now uses directly syscalls instead of wrapping commandline tools into system() calls - test_progs manipulates /dev/null (eg: redirecting test logs into it), so disabling access to it in the bpf program confuses the tests. To fix this, the first commit modifies the bpf program to allow access to char devices 1:3 (/dev/null), and disable access to char devices 1:5 (/dev/zero) - once test is converted, add a small subtest to also check for device type interpretation (char or block) - paths used in mknod tests are now in /dev instead of /tmp: due to the CI runner organisation and mountpoints manipulations, trying to create nodes in /tmp leads to errors unrelated to the test (ie, mknod calls refused by kernel, not the bpf program). I don't understand exactly the root cause at the deepest point (all I see in CI is an -ENXIO error on mknod when trying to create the node in tmp, and I can not make sense out of it neither replicate it locally), so I would gladly take inputs from anyone more educated than me about this. The new test_progs part has been tested in a local qemu environment as well as in upstream CI: ./test_progs -a cgroup_dev 47/1 cgroup_dev/deny-mknod:OK 47/2 cgroup_dev/allow-mknod:OK 47/3 cgroup_dev/deny-mknod-wrong-type:OK 47/4 cgroup_dev/allow-read:OK 47/5 cgroup_dev/allow-write:OK 47/6 cgroup_dev/deny-read:OK 47/7 cgroup_dev/deny-write:OK 47 cgroup_dev:OK Summary: 1/7 PASSED, 0 SKIPPED, 0 FAILED --- Changes in v2: - directly pass expected ret code to subtests instead of boolean pass/not pass - fix faulty fd check in subtest expected to fail on open - fix wrong subtest name - pass test buffer and corresponding size to read/write subtests - use correct series prefix - Link to v1: https://lore.kernel.org/r/20240725-convert_dev_cgroup-v1-0-2c8cbd487c44@bootlin.com --- Alexis Lothoré (eBPF Foundation) (3): selftests/bpf: do not disable /dev/null device access in cgroup dev test selftests/bpf: convert test_dev_cgroup to test_progs selftests/bpf: add wrong type test to cgroup dev tools/testing/selftests/bpf/.gitignore | 1 - tools/testing/selftests/bpf/Makefile | 2 - .../testing/selftests/bpf/prog_tests/cgroup_dev.c | 113 +++++++++++++++++++++ tools/testing/selftests/bpf/progs/dev_cgroup.c | 4 +- tools/testing/selftests/bpf/test_dev_cgroup.c | 85 ---------------- 5 files changed, 115 insertions(+), 90 deletions(-) --- base-commit: 3e9fef7751a84a7d02bbe14a67d3a5d301cbd156 change-id: 20240723-convert_dev_cgroup-6464b0d37f1a Best regards,