From mboxrd@z Thu Jan 1 00:00:00 1970 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 9A109359F95; Fri, 24 Oct 2025 10:57:44 +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=1761303464; cv=none; b=tXpn3MKK50CrBSeQCucYJg4uyE71ciPc4XMAT1fYthBWu/YUG/Ct9pLTuo6wooQaE6CgNrmWL+/fmHt25ZIsZTED1jGq7h5TM3IiK9OoPe5x73dYDGkIVeayC7SQobqkFCWdIqp/W5vKhZGUWFRvb4pNol9onDmXDHX3571I4jM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761303464; c=relaxed/simple; bh=BCihYefUNETnf9SgrifE/6AmFo1JxPKscMdQ4tQ9EDw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=LQRjUHPg0arOnOPidHNNC+K8qrpv/i5rXAcf/Z7eqiLpw+b4iI2DAjOa0esP1BPlCDYM9OC7peubYXaF3a4uR/KDe0lfmhfrmqkK1iNoxxUH+18Sa0k5HQi16opcUbShN0pL3SQeXCJAkD07haPTqoq0jF8MNFoDF130xKN1xkY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=nNyb7/5D; 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="nNyb7/5D" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E243EC113D0; Fri, 24 Oct 2025 10:57:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761303464; bh=BCihYefUNETnf9SgrifE/6AmFo1JxPKscMdQ4tQ9EDw=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=nNyb7/5DUtDexae+j+ZgdLJera/saAvPv6qpaToXs2JbZ49bim7ADeJcqib15NdAj 6y03rXzSp1UVNnVftKGUWpA++RGKDhylYo87A0cF47xjsV18KanTQ4SbsJrBR+399y BPHAE2w1wEu1pWei9YYG1gh012LIYP0A2yV54lwSxnb8YjobJcL6g+AokeJdH2Umlj m9yfZj/9WwVemnMP/hlijWj7LZ7VfwRhxs95EiFaHd1mYHBdop2yrgqRPe1bj2c2dO x8L56CXj12Xnt1jLIhKGqSvFHN1BLLR+TfNw4Pa3S8Rephqo2bZUZtfx4XFnQYqFt3 Sm6Y8TI3Iv8mw== From: Christian Brauner Date: Fri, 24 Oct 2025 12:53:25 +0200 Subject: [PATCH v3 56/70] selftests/namespaces: fourth inactive namespace resurrection test Precedence: bulk X-Mailing-List: cgroups@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: <20251024-work-namespace-nstree-listns-v3-56-b6241981b72b@kernel.org> References: <20251024-work-namespace-nstree-listns-v3-0-b6241981b72b@kernel.org> In-Reply-To: <20251024-work-namespace-nstree-listns-v3-0-b6241981b72b@kernel.org> To: linux-fsdevel@vger.kernel.org, Josef Bacik , Jeff Layton Cc: Jann Horn , Mike Yuan , =?utf-8?q?Zbigniew_J=C4=99drzejewski-Szmek?= , Lennart Poettering , Daan De Meyer , Aleksa Sarai , Amir Goldstein , Tejun Heo , Johannes Weiner , Thomas Gleixner , Alexander Viro , Jan Kara , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, bpf@vger.kernel.org, Eric Dumazet , Jakub Kicinski , netdev@vger.kernel.org, Arnd Bergmann , Christian Brauner X-Mailer: b4 0.15-dev-96507 X-Developer-Signature: v=1; a=openpgp-sha256; l=2063; i=brauner@kernel.org; h=from:subject:message-id; bh=BCihYefUNETnf9SgrifE/6AmFo1JxPKscMdQ4tQ9EDw=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWT8jmrX9VjosO/Ha9YF8pu+KXleMwgvtX9578f1Y+9+C ecq6ZvN6ShlYRDjYpAVU2RxaDcJl1vOU7HZKFMDZg4rE8gQBi5OAZjIgnBGhm/Km7jW7jn9aHtj x8EnZTOtJ/QqvAg4Yst25kxOydf9tYaMDL82FV89fd2+7QDD/6ofP8/MnLtgZ+GKZ0Vfn9YmJqU vC+UHAA== X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Test SIOCGSKNS across setns. Create a socket in netns A, switch to netns B, verify SIOCGSKNS still returns netns A. Signed-off-by: Christian Brauner --- .../testing/selftests/namespaces/siocgskns_test.c | 51 ++++++++++++++++++++++ 1 file changed, 51 insertions(+) diff --git a/tools/testing/selftests/namespaces/siocgskns_test.c b/tools/testing/selftests/namespaces/siocgskns_test.c index 02798e59fc11..28e45954c4fa 100644 --- a/tools/testing/selftests/namespaces/siocgskns_test.c +++ b/tools/testing/selftests/namespaces/siocgskns_test.c @@ -256,4 +256,55 @@ TEST(siocgskns_socket_types) close(sock_udp); } +/* + * Test SIOCGSKNS across setns. + * Create a socket in netns A, switch to netns B, verify SIOCGSKNS still + * returns netns A. + */ +TEST(siocgskns_across_setns) +{ + int sock_fd, netns_a_fd, netns_b_fd, result_fd; + struct stat st_a; + + /* Get current netns (A) */ + netns_a_fd = open("/proc/self/ns/net", O_RDONLY); + ASSERT_GE(netns_a_fd, 0); + ASSERT_EQ(fstat(netns_a_fd, &st_a), 0); + + /* Create socket in netns A */ + sock_fd = socket(AF_INET, SOCK_STREAM, 0); + ASSERT_GE(sock_fd, 0); + + /* Create new netns (B) */ + ASSERT_EQ(unshare(CLONE_NEWNET), 0); + + netns_b_fd = open("/proc/self/ns/net", O_RDONLY); + ASSERT_GE(netns_b_fd, 0); + + /* Get netns from socket created in A */ + result_fd = ioctl(sock_fd, SIOCGSKNS); + if (result_fd < 0) { + close(sock_fd); + setns(netns_a_fd, CLONE_NEWNET); + close(netns_a_fd); + close(netns_b_fd); + if (errno == ENOTTY || errno == EINVAL) + SKIP(return, "SIOCGSKNS not supported"); + ASSERT_GE(result_fd, 0); + } + + /* Verify it still points to netns A */ + struct stat st_result_stat; + ASSERT_EQ(fstat(result_fd, &st_result_stat), 0); + ASSERT_EQ(st_a.st_ino, st_result_stat.st_ino); + + close(result_fd); + close(sock_fd); + close(netns_b_fd); + + /* Restore original netns */ + ASSERT_EQ(setns(netns_a_fd, CLONE_NEWNET), 0); + close(netns_a_fd); +} + TEST_HARNESS_MAIN -- 2.47.3