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 6DB7A35A122; Wed, 22 Oct 2025 16:11:09 +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=1761149469; cv=none; b=YSSMQaxXS03osGKJx2nulReY/536rC/XJ1VkyyVHJe9LnM5mMpkJGxpTgVMDYDzpHBwK0P9Ei+UlmrkoFhO/cd8pObn0/Uaz/tXcic7ZeukPNuispR8y0lgsERKKbcN5Tz2TcW3yC1mWjbwfzmukQBnYZTvoHjov2w7BKLlx71g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761149469; c=relaxed/simple; bh=udWXbE5GIXnpNt82C6OUf1abPXO2lL6zpT/iVGrkFOU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=f7x1bpe73t9fmzNBg67wdJVvE6wmojYp4fJ2Zjzce+3yUuRuIp017moFUq2BKP1I0A+3nhGJsj0eAuTB+4HUZG8h2uVeNRd23bkUzi+cpdgyoSoaQWy31M8K+UatAEwNheKsi0uBdk9hAMmDHVsuD8jJ/7azhxxU4AAzkbW+P1E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hxxZxfWW; 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="hxxZxfWW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 676E6C4CEF7; Wed, 22 Oct 2025 16:11:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761149469; bh=udWXbE5GIXnpNt82C6OUf1abPXO2lL6zpT/iVGrkFOU=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=hxxZxfWWABrUFXrO/bZG0jmsm/Cx6NWBnP3oaWY9gDoYKBGY01W1AA1u5cmhY8aLI K6LGQ+SA4RSZzTfGA6CaHz/2AA7R0mxXpD9RGPC0RrFH6KSnxBnXkFWWcnT1Bc5+ym 444k3iKuG6ZB030Rw0u8GZnac/pdCx03H5VfnarcwJl0kmkWxloBnNECT9xInwcpqf sccmq8R1po/dbc3mgcnA0eUzxf6xMu+9JcijcwNWTrPfUGqj4TWUZDn3OVESy4LlvM lriv3h4KIB+ig/nmusMCXx3y6zCEKVq2mPEMnxWafwgYg3YEpFNJTJivI/k9vYxNti RTXJ6/gnw+Wog== From: Christian Brauner Date: Wed, 22 Oct 2025 18:06:35 +0200 Subject: [PATCH v2 57/63] selftests/namespaces: sixth 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: <20251022-work-namespace-nstree-listns-v2-57-71a588572371@kernel.org> References: <20251022-work-namespace-nstree-listns-v2-0-71a588572371@kernel.org> In-Reply-To: <20251022-work-namespace-nstree-listns-v2-0-71a588572371@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=2328; i=brauner@kernel.org; h=from:subject:message-id; bh=udWXbE5GIXnpNt82C6OUf1abPXO2lL6zpT/iVGrkFOU=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWT8ZHie7zDhYp3Dqp7nC3f/k1h/mlP3XfRW028z3trPf P3ru5vclo5SFgYxLgZZMUUWh3aTcLnlPBWbjTI1YOawMoEMYeDiFICJSJ5lZHi9UUjmz/zFC2Wf rIsJrnp1f9vGd9fmbXW9e6Wsjaun7bs/wz9DwSxF10tWRy6+ij/4qKi3+eDTXAOBT9ffZHbdaFG X3MsOAA== X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Test multiple sockets keep the same network namespace active. Create multiple sockets, verify closing some doesn't affect others. Signed-off-by: Christian Brauner --- .../testing/selftests/namespaces/siocgskns_test.c | 68 ++++++++++++++++++++++ 1 file changed, 68 insertions(+) diff --git a/tools/testing/selftests/namespaces/siocgskns_test.c b/tools/testing/selftests/namespaces/siocgskns_test.c index 4134a13c2f74..d11b3a9c4cfd 100644 --- a/tools/testing/selftests/namespaces/siocgskns_test.c +++ b/tools/testing/selftests/namespaces/siocgskns_test.c @@ -334,4 +334,72 @@ TEST(siocgskns_non_socket) close(pipefd[1]); } +/* + * Test multiple sockets keep the same network namespace active. + * Create multiple sockets, verify closing some doesn't affect others. + */ +TEST(siocgskns_multiple_sockets) +{ + int socks[5]; + int netns_fds[5]; + int i; + struct stat st; + ino_t netns_ino; + + /* Create new network namespace */ + ASSERT_EQ(unshare(CLONE_NEWNET), 0); + + /* Create multiple sockets */ + for (i = 0; i < 5; i++) { + socks[i] = socket(AF_INET, SOCK_STREAM, 0); + ASSERT_GE(socks[i], 0); + } + + /* Get netns from all sockets */ + for (i = 0; i < 5; i++) { + netns_fds[i] = ioctl(socks[i], SIOCGSKNS); + if (netns_fds[i] < 0) { + int j; + for (j = 0; j <= i; j++) { + close(socks[j]); + if (j < i && netns_fds[j] >= 0) + close(netns_fds[j]); + } + if (errno == ENOTTY || errno == EINVAL) + SKIP(return, "SIOCGSKNS not supported"); + ASSERT_GE(netns_fds[i], 0); + } + } + + /* Verify all point to same netns */ + ASSERT_EQ(fstat(netns_fds[0], &st), 0); + netns_ino = st.st_ino; + + for (i = 1; i < 5; i++) { + ASSERT_EQ(fstat(netns_fds[i], &st), 0); + ASSERT_EQ(st.st_ino, netns_ino); + } + + /* Close some sockets */ + for (i = 0; i < 3; i++) { + close(socks[i]); + } + + /* Remaining netns FDs should still be valid */ + for (i = 3; i < 5; i++) { + char path[64]; + snprintf(path, sizeof(path), "/proc/self/fd/%d", netns_fds[i]); + int test_fd = open(path, O_RDONLY); + ASSERT_GE(test_fd, 0); + close(test_fd); + } + + /* Cleanup */ + for (i = 0; i < 5; i++) { + if (i >= 3) + close(socks[i]); + close(netns_fds[i]); + } +} + TEST_HARNESS_MAIN -- 2.47.3