From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj2-f13.google.com (mail-pj2-f13.google.com [74.125.227.141]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F051F3CC323 for ; Sat, 19 Sep 2026 11:01:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.227.141 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789815694; cv=none; b=M059QxgFsMIqyY5oJOZgNTDB/i7cQASAViYW8dHM4n8IQC67mAaBh28Ua1J7e0ieqf4Kslb+bO2aYay4EczqH7H0zrlVIlSY4Z8mqCermDxd1QwVUtPIs5m2iZztUGRpPCEyCIelOJmQKwPr6XpVNqvORJdaTs9a1fzL7x8iF/s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789815694; c=relaxed/simple; bh=ieyVfeWZqbE1yKbLmklEHB6pUgsMwiuMSXZ+6dhoRdA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ahaAlJM1EQv3TDm+CZOCm7n+F35kNsF0PNc2L0euMElOwKmRukitsaStgrLJvxVHGNK1Tmei7zXi0Zrl9T53nvvDdz7FzsSiQ4in81Y7JfrsQjEJLCvbQXGifSIbSZTysulD1i6ZKB5pdRBhE3Xh+S0e+2EZRwafZA1nbYMTrnM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=clZn9/ua; arc=none smtp.client-ip=74.125.227.141 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="clZn9/ua" Received: by mail-pj2-f13.google.com with SMTP id 98e67ed59e1d1-39b31b4281eso1640262a91.2 for ; Sat, 19 Sep 2026 04:01:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1789815691; x=1790420491; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=5CrEZGhAP68TvzaEU08InnPyZJBhHkfbU1+U3CFH3UQ=; b=clZn9/uaP18IW7DvFCYpoXARmC0vHJrCmEE3vA2XDMVDxCaLvmkYNQBAIcZy2ubVYz /qldp9QhV1QGiBjx24mtuouBG8yTfFN+dYbOFPlWd6QpHNOz2VZhALqgTQE7sWq4AKg7 g5ivaxL97KewFi/PiULHhQ4DDETBrjfhxZQtPve51MjE4D9Svp5NtdoAlN21hNaSMWBK dJmNotjQM3et7nzXyHBiv7dO+g1fk7Hagoruz3Q2/wetuwmAxNMKQoLb6gwEPzBfNiRu HuVRy3a4dZJIOVZ7ry1XJoNrRYklgvwAzLjEV/MUugn8SyBVoY7Y6tdzaGxF0ULBYYZt v3iw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1789815691; x=1790420491; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=5CrEZGhAP68TvzaEU08InnPyZJBhHkfbU1+U3CFH3UQ=; b=bVe5WrQ10TicDHpBQLzs89ET1s8Uu0cOkJsznLFos80o8by+qTPaivTz73KpfaZh5e mIHhnsJHvKVH/YNA3oNWPD/s1PoYOOK+rkRgmMwGUhpNWdiWnqIYtZTp4AbXERi/4SkA ZNusHcVFRmKkV+ufc6XLbaxx49RXsKjxyezRHNwkrFh5u6zIdhut84sWBEHautdeUHri RLHxMnIs1rHTw7k6ol0VwE71+pdYWCA0sYnhm9MjUYAlECVfWA0wShbiALNWTM1Hnm1n qEyfuYn9P3Jz+3B2nqcer1wYgGqVWQ+2qTDCs0J5QoiolJAdglBwOnZ2xORU2IBbhLSw 0M3Q== X-Forwarded-Encrypted: i=1; AKwUvBwQlZ1lwJrCxe2z3InosYkDRhNMvYUIpkEk8q3RzHPrsK/Uu1qBPKGuCMHl1rtL2BfnEFy9Qsc=@vger.kernel.org X-Gm-Message-State: AFuF++kNHr/khA2mXptSH0c8R4iLqs+7gADhbVfBzGrz5rCWF/fbYns1 Z3YttTCoKDIAOQrSJtEyMxJAR+ElO3FIsAuzi3WkgLaqlbO7VkdJqlvx X-Gm-Gg: AYBFou3GWIccz7C6fYiXKXOW9ll1D3KZgxFB8DMXKoi+NnThZSTaRgZcaccSi5ceG7D tlsIm43HHFfk7Q3jN5d7VTZe4UiboQA0NeydnKadcdAvoIvxJdDiUWOMjA/q6jHddiszs9WCwZA nNDs6sE3YTe9xO4AWnT3QWADnsaPvSkAJOs7VbCO63nhyEOuAn2qoQ4eee5yOMYX8K/vAeB7B0o CmFknZjq9MxKmoRa6yhgKK9bYf+omWNFDm3yKEUeDW47WxI4aU0+lY2QptwtgsUShFtIpwrJ2aq XwOWRyGEae7gnTXsceJFf0Jop4NAm560Mt9rYV0V1Fj4It//TCJoiWF7OscxUqpcq7kphYOJ5HF QZq4ZJv5XZ9sUchpglq93elxWd9cFLcFFNz65wwDOnpTnYoVPs6IHa3pltaWAXu8/L9mlhAKFOo tdNmSPeP0m+s+SmRgyLzaS4QkEXH/AS0gNHF7IL8FKlcDTGrmAhsDyazm5XjU/cUz1UbrYXbAEU oZskU+zhJlWSwoc8xJ8SNDGoT+1IAU7 X-Received: by 2002:a17:90b:2584:b0:39e:6c68:c787 with SMTP id 98e67ed59e1d1-39e6c68ca2emr3126815a91.61.1789815689714; Sat, 19 Sep 2026 04:01:29 -0700 (PDT) Received: from 192.168.50.3 ([198.176.50.208]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39e6c4ba12csm4147054a91.11.2026.09.19.04.01.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 19 Sep 2026 04:01:29 -0700 (PDT) From: bestswngs@gmail.com To: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, eddyz87@gmail.com, memxor@gmail.com, bpf@vger.kernel.org, netdev@vger.kernel.org Cc: martin.lau@linux.dev, song@kernel.org, yonghong.song@linux.dev, jolsa@kernel.org, emil@etsalapatis.com, ihor.solodrai@linux.dev, davem@davemloft.net, kuba@kernel.org, hawk@kernel.org, john.fastabend@gmail.com, sdf@fomichev.me, xmei5@asu.edu, co+ac0a8c41de69121d@bugs.sh, Weiming Shi Subject: [PATCH bpf v2 2/2] selftests: net: test cross-device XDP dev-bound attachment Date: Sat, 19 Sep 2026 19:00:54 +0800 Message-ID: <20260919110053.497301-3-bestswngs@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260919110053.497301-2-bestswngs@gmail.com> References: <20260917161335.1020405-2-bestswngs@gmail.com> <20260919110053.497301-2-bestswngs@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Weiming Shi Add a regression test which loads dev-bound-only XDP programs on both ends of a veth pair. Verify that attaching one program to the other device is rejected with the expected extack. The second program keeps a bound-only registration for the target device, recreating the NULL-offdev collision fixed by the previous patch. Link: https://lore.kernel.org/bpf/20260917161335.1020405-2-bestswngs@gmail.com/ Assisted-by: LLM Signed-off-by: Weiming Shi --- Changes in v2: - New patch. tools/testing/selftests/net/bpf_offload.py | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/tools/testing/selftests/net/bpf_offload.py b/tools/testing/selftests/net/bpf_offload.py index c856d266c..017910b4d 100755 --- a/tools/testing/selftests/net/bpf_offload.py +++ b/tools/testing/selftests/net/bpf_offload.py @@ -995,6 +995,24 @@ try: rm("/sys/fs/bpf/devbound") sim.wait_for_flush() + start_test("Test dev-bound program on a different device...") + cmd("ip link add bpfveth0 type veth peer name bpfveth1") + try: + bpftool_prog_load("sample_ret0.bpf.o", "/sys/fs/bpf/devbound0", + dev_bind="bpfveth0") + bpftool_prog_load("sample_ret0.bpf.o", "/sys/fs/bpf/devbound1", + dev_bind="bpfveth1") + ret, _, err = ip("link set dev bpfveth1 xdpdrv " + + bpf_pinned("/sys/fs/bpf/devbound0"), fail=False, + include_stderr=True) + fail(ret == 0, "dev-bound program attached to a different device") + check_extack(err, "Program bound to different device.", args) + finally: + cmd("ip link del bpfveth0", fail=False) + rm("/sys/fs/bpf/devbound0") + rm("/sys/fs/bpf/devbound1") + bpftool_prog_list_wait(expected=0) + start_test("Test XDP load failure...") sim.dfs["dev/bpf_bind_verifier_accept"] = 0 ret, _, err = bpftool_prog_load("sample_ret0.bpf.o", "/sys/fs/bpf/offload", -- 2.55.0