From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f45.google.com (mail-pj1-f45.google.com [209.85.216.45]) (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 274B1329E44 for ; Tue, 18 Nov 2025 02:00:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.45 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763431246; cv=none; b=qOzxTyc34YUmFKSj2OqM28QFEOuI+TlKF30wheMlSTxJtPr1F/BevXP91Vv9Z5s9j0/MpWgwx88N2gy1qZPy7a88+e6yrtOCEvuaGPmotSJZfvP5iXfj/ZZWtQEkM4lecOJYNebhvjEN8ybxGW9WhOVtc7NDVi07FPhrYAlJR/k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763431246; c=relaxed/simple; bh=3zstnYgrjjZTcL85zX/bwEXTpc6YD365WK9ireof2ic=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=AiYJV3DFf6TqzpTcrhMxaDlbpstJVcG8HraUNMbF51kGWSkgJUP0Ve/RDlJnbSZCQBr8yVF7L4IU40DCQuf11udWH6Ve6teUSURCCeBuc4aQfzhd0rVLPl4NvpUESUTEmJV79qFfqsjASDSh5s04ymo6v7cGmPs+myM0YrPDuL4= 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=eEuuUKxL; arc=none smtp.client-ip=209.85.216.45 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="eEuuUKxL" Received: by mail-pj1-f45.google.com with SMTP id 98e67ed59e1d1-34372216275so5389482a91.2 for ; Mon, 17 Nov 2025 18:00:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1763431239; x=1764036039; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=Qhvm+dnH460Tt7FFn5Fd2rcGuVIIsnu9XpGRtebTbS8=; b=eEuuUKxL88H+xzP55NnbfD0ZfoPSM7SRsjmUxTXzBKeZWGRe3YuCFT7Ow3SHCJu9c/ 3LvT8dHQDa1umpIX81H9AGnkuHo3qo2ndLFYnupHNUBpP6PI/f0TSeegqQ/JBGxSmy36 +SOflAfMc4ddC+8qcaxNkkhfvDtaVP6xL+93AXfhgcR+7Ioy6VmHT18vjUK7hoAu5Ffj qX3tfHBKicu8PP5UWSuUOt70kcswnMlYtdmqZgL5aGAhymOT7dhRjHpzCqJzYYL1EnHA uFksu+WpZdSv4l5isS8OicvDeF3HSwB1ejJ+CF8NY/A6CQWqJAxhPhp15eqZYa1IG4QQ 7mYw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763431239; x=1764036039; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-gg:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=Qhvm+dnH460Tt7FFn5Fd2rcGuVIIsnu9XpGRtebTbS8=; b=rQbUnqc66Az5fuCSdZ2urxqlBGQYBawGfRukzHAaWfMrKA8d5yIsOd9sc2dEehxUMh KO+nzm7g9RVvQsYtLgnV9VGeNZ/xnzvamMX4/4tjbUb6E0oDLFv5ALc1DMLGftbwcnJw omivcmXDS/baSPESwztXo9s1AbsaGurh2l5dcGwRgZV9+UNEieN+WMrFe9d9TcmIjbvI UUNeLb5NCiDLiPKRvmC43HnhrcVx38N7wkRYve/U20V/ErJrSqOV530zCYGjjVGJTVix 7H5zAEIk7R+BPj4TdietGTCf7KJXRZDSzLLRkTwo05AHoWJYMZKITKwlySanUrZRXFkr qMgw== X-Forwarded-Encrypted: i=1; AJvYcCVZ9Mc84JB0NIDS8eXz5vqdrnfN/70NGpSAzmRwbSWlwpSEePm1aqIn287liyi9VNfnlu6uqmWmdW2Fd/E=@vger.kernel.org X-Gm-Message-State: AOJu0YyIAXh3mU9VgGmEsfEoKesphGbsvLewzCAFINMN14Nwb9TLhyWh zWoRVn2CYvi6BEiDMb07OlZ5dHPmqmq8lT79fA7fW7sj/bpgzUy0bkvV X-Gm-Gg: ASbGnctziXeNOZJjzdDQZtwLHIiFQ/4ZJkJPciOs9JnbUVoqrQW3gayRgVHgFevwQUe dIxqFYsto24L7vAhxgLh2h2VcrAff290NKh1TjyiSGjbi+uoDbNkn7dHr1qERQTYVkE3z565kBX wo04flhyYume4Uv7pcU3ghcd2+fiVRlCKL/EByWu+93NdnSH3UhCJrOksAcOLZ0VD7Fg07K4o7Z FnAVPFO8uJ23BUYezIdi+F/ocmLMEjbPsVo9vvwddILnnSXjbh27OsrXV8+CmSTjs1fAvuubVTI XLUQniUnWctoPrSEL33ucvdRNu/gwyen/8zBYHE+/POqZVQwj5U6ZJU9SSvR/myau+TVppejm3p kXfpv5kodCVOV4FCsfNsRgUY/xQjrUUwQ/d1r0F3BgqpwE7azfuc67y1Nu94Tv/l2D3J4OiEE2i 8tP0YtsuNUWIGoxefZlS6fbYEcCiHv4Q== X-Google-Smtp-Source: AGHT+IFqV1GrHr3XrPIYmCcvEa4oEIM7omi6fW12jvd7AtWF00Di4zCzOTV0RIbzxFbKb2Lo+nb8Qw== X-Received: by 2002:a17:90b:2f08:b0:33b:dec9:d9aa with SMTP id 98e67ed59e1d1-343fa7493admr15317741a91.25.1763431239229; Mon, 17 Nov 2025 18:00:39 -0800 (PST) Received: from localhost ([2a03:2880:2ff:1::]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-345b0202b16sm369741a91.2.2025.11.17.18.00.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Nov 2025 18:00:38 -0800 (PST) From: Bobby Eshleman Date: Mon, 17 Nov 2025 18:00:32 -0800 Subject: [PATCH net-next v10 09/11] selftests/vsock: add namespace tests for CID collisions Precedence: bulk X-Mailing-List: linux-hyperv@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20251117-vsock-vmtest-v10-9-df08f165bf3e@meta.com> References: <20251117-vsock-vmtest-v10-0-df08f165bf3e@meta.com> In-Reply-To: <20251117-vsock-vmtest-v10-0-df08f165bf3e@meta.com> To: Stefano Garzarella , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Stefan Hajnoczi , "Michael S. Tsirkin" , Jason Wang , =?utf-8?q?Eugenio_P=C3=A9rez?= , Xuan Zhuo , "K. Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Bryan Tan , Vishnu Dasa , Broadcom internal kernel review list , Shuah Khan Cc: linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, netdev@vger.kernel.org, kvm@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kselftest@vger.kernel.org, Sargun Dhillon , Bobby Eshleman , berrange@redhat.com, Bobby Eshleman X-Mailer: b4 0.14.3 From: Bobby Eshleman Add tests to verify CID collision rules across different vsock namespace modes. 1. Two VMs with the same CID cannot start in different global namespaces (ns_global_same_cid_fails) 2. Two VMs with the same CID can start in different local namespaces (ns_local_same_cid_ok) 3. VMs with the same CID can coexist when one is in a global namespace and another is in a local namespace (ns_global_local_same_cid_ok and ns_local_global_same_cid_ok) The tests ns_global_local_same_cid_ok and ns_local_global_same_cid_ok make sure that ordering does not matter. The tests use a shared helper function namespaces_can_boot_same_cid() that attempts to start two VMs with identical CIDs in the specified namespaces and verifies whether VM initialization failed or succeeded. Signed-off-by: Bobby Eshleman --- tools/testing/selftests/vsock/vmtest.sh | 73 +++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh index 86483249f490..a8bf78a5075d 100755 --- a/tools/testing/selftests/vsock/vmtest.sh +++ b/tools/testing/selftests/vsock/vmtest.sh @@ -48,6 +48,10 @@ readonly TEST_NAMES=( ns_host_vsock_ns_mode_ok ns_host_vsock_ns_mode_write_once_ok ns_vm_local_mode_rejected + ns_global_same_cid_fails + ns_local_same_cid_ok + ns_global_local_same_cid_ok + ns_local_global_same_cid_ok ) readonly TEST_DESCS=( # vm_server_host_client @@ -67,6 +71,17 @@ readonly TEST_DESCS=( # ns_vm_local_mode_rejected "Test that guest VM with G2H transport cannot set namespace mode to 'local'" + # ns_global_same_cid_fails + "Check QEMU fails to start two VMs with same CID in two different global namespaces." + + # ns_local_same_cid_ok + "Check QEMU successfully starts two VMs with same CID in two different local namespaces." + + # ns_global_local_same_cid_ok + "Check QEMU successfully starts one VM in a global ns and then another VM in a local ns with the same CID." + + # ns_local_global_same_cid_ok + "Check QEMU successfully starts one VM in a local ns and then another VM in a global ns with the same CID." ) readonly USE_SHARED_VM=( @@ -553,6 +568,64 @@ test_ns_host_vsock_ns_mode_ok() { return "${KSFT_PASS}" } +namespaces_can_boot_same_cid() { + local ns0=$1 + local ns1=$2 + local pidfile1 pidfile2 + local rc + + pidfile1="$(create_pidfile)" + vm_start "${pidfile1}" "${ns0}" + + pidfile2="$(create_pidfile)" + vm_start "${pidfile2}" "${ns1}" + + rc=$? + terminate_pidfiles "${pidfile1}" "${pidfile2}" + + return "${rc}" +} + +test_ns_global_same_cid_fails() { + init_namespaces + + if namespaces_can_boot_same_cid "global0" "global1"; then + return "${KSFT_FAIL}" + fi + + return "${KSFT_PASS}" +} + +test_ns_local_global_same_cid_ok() { + init_namespaces + + if namespaces_can_boot_same_cid "local0" "global0"; then + return "${KSFT_PASS}" + fi + + return "${KSFT_FAIL}" +} + +test_ns_global_local_same_cid_ok() { + init_namespaces + + if namespaces_can_boot_same_cid "global0" "local0"; then + return "${KSFT_PASS}" + fi + + return "${KSFT_FAIL}" +} + +test_ns_local_same_cid_ok() { + init_namespaces + + if namespaces_can_boot_same_cid "local0" "local0"; then + return "${KSFT_FAIL}" + fi + + return "${KSFT_PASS}" +} + test_ns_host_vsock_ns_mode_write_once_ok() { for mode in "${NS_MODES[@]}"; do local ns="${mode}0" -- 2.47.3