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 ACFE1354716; Wed, 29 Oct 2025 12:25:32 +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=1761740732; cv=none; b=YTE6nR0PHC8M8D3SizEuR/2MaBEi7VxZ42dTWMDfni6rxg+NMPbu/SrQA0Pf6ZnNCes7opJArHKJHf8ILf36gs1OQx9Y4WXfKPmlZM71cqGRf9vyu/0e689uAiscnk1vHXnqSw42V0HEU8t1LUunTxfkWQrxPIKJ4v5TrwVr6gs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761740732; c=relaxed/simple; bh=BCihYefUNETnf9SgrifE/6AmFo1JxPKscMdQ4tQ9EDw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=KTtYliKeNNhunEPHlojFWSfASnHeYrWhMGJvPFcG/c9FITcFUeuQsFg8eaiwlFMz4HgN8vtmWT02iLv8CSr5M73v5ZBI2Ep4CA0i9+8ib29RqUFqTT1Z52xPpltsBnJ6wJDxbDMI9HpiXShStJBeu6yhmvZhWfdb4flenXvFP1c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=sr0R3nwM; 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="sr0R3nwM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 882C1C4CEFF; Wed, 29 Oct 2025 12:25:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761740732; bh=BCihYefUNETnf9SgrifE/6AmFo1JxPKscMdQ4tQ9EDw=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=sr0R3nwM5NELIOUxeHFV5+E4EBYvw2gEiBldk/HJs9GAV5J7av2zSZrrOMFkSc+6B rKEqRxqpgZpwGPuOy/hsUWyJsjI0tZGNyLnQGyXrjgzJ5sELCDZlItHUlGpBvQtGhq Yx8sO9daT50YbyWJoUrM8PnUPY4MxvO6nTh160C/fXbpHPRzt1n9OGyqA3PeeBTsw4 dUbqo9suklAUEQXtVQPuTjOfHWJEskK7B83n+AfqsHzavuD/3EyAR2YHuqBl/CcdcB 8n12rlBg/J8Y7PEh+j9i0Ror/prXwk6UOQ/1BKU+qaUOo3x4gVTGJwAZDGQcoscBJ1 u/g+8z/JuT3ow== From: Christian Brauner Date: Wed, 29 Oct 2025 13:21:11 +0100 Subject: [PATCH v4 58/72] selftests/namespaces: fourth inactive namespace resurrection test Precedence: bulk X-Mailing-List: linux-fsdevel@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: <20251029-work-namespace-nstree-listns-v4-58-2e6f823ebdc0@kernel.org> References: <20251029-work-namespace-nstree-listns-v4-0-2e6f823ebdc0@kernel.org> In-Reply-To: <20251029-work-namespace-nstree-listns-v4-0-2e6f823ebdc0@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=owGbwMvMwCU28Zj0gdSKO4sYT6slMWQysfU/Dskrzf3c4/LL1mTHfo1p52W8zvlltWyQud3Uw SpSsOtfRykLgxgXg6yYIotDu0m43HKeis1GmRowc1iZQIYwcHEKwEQ0hBgZzu2d8ON8/WeNG91l GxZfzootELJ60LVggUW1r3JE9f4LTIwME9i2asyMXtxtN82j/cWTjKAA7pbZ4jYlsx++3HrqvtB 9BgA= 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