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 95C4C37DBD1; Wed, 22 Oct 2025 16:09:33 +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=1761149373; cv=none; b=Nj1b4jdhht1iv7ttIkjqmjrpHYhaYKdc7Me8y9ihPyY3WQ8EtuU7F79bhNA2yeWJx7uFJqb9Lu+2pI6M8jgBqPcW4Nvtr/Z7b3xZEQxU+5ioMztnKJ5386vaP9kwbN8GWaB4dBb5UODClFQa9Q9UP1WeJaWXJYVZWCjG4Y3xz7U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761149373; c=relaxed/simple; bh=UxNNzwwfXU08oQlPAvQ0Gj3cx0fWVzo9FwN6OUP3IWE=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=sPwwzxgnY7IdWUITlfF4FisNd2QJ1kHrsjb0Ww5pUloHx/VzVwnQbX50GWPTkjBQ2D/WLWVkihg007flEXgzoPEy73Y39xrPx2yvRYMtE7HYYPZVNTeK2UF/ijHuwFPtk6Fk2pu6J5TCjquBaDQxd0qXi4QCQyXSQ5ytbjY3vTQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=pbPziWur; 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="pbPziWur" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8FDE9C4CEE7; Wed, 22 Oct 2025 16:09:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761149373; bh=UxNNzwwfXU08oQlPAvQ0Gj3cx0fWVzo9FwN6OUP3IWE=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=pbPziWurzZXsIhxuB+HDNzhxnMAdP+UkGsueFIkOGWKkNIS2oPe2dn1qyYb5LEDWT Jw6uje+s9hTZf9vqdbrRcOWa2eqMwLljmM+wRDxEmsWDV0Msug9IXjWcrB7dpGGuGc 7MPHvwM/EuhokGIVvEvLEGdoLax+ujvxANqNvqx8MBIJ6n4lB1lYAVp7JzRc37hv8V 2Ht0KDPbLgo+YO0WTdR3faDP9Y+cb8nG3fVkApMa7So/ScmWXkouYjQloL4bH3ZnvL c9DFXh9KG5KwaMoU+903V5IVWnsiDhrqEX/YjJPByyJaW3AiBryx6LPPLfDtSbo8y3 /8l7TgG80RlgQ== From: Christian Brauner Date: Wed, 22 Oct 2025 18:06:17 +0200 Subject: [PATCH v2 39/63] selftests/namespaces: fourth listns() 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-v2-39-71a588572371@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=1513; i=brauner@kernel.org; h=from:subject:message-id; bh=UxNNzwwfXU08oQlPAvQ0Gj3cx0fWVzo9FwN6OUP3IWE=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWT8ZHj2corZm0rB+u7KDz/2BH3t+5/J47IofP2zhbf2T jWzM/v8rqOUhUGMi0FWTJHFod0kXG45T8Vmo0wNmDmsTCBDGLg4BWAikosZGV7HXuri0FOWuvBa VOlHtfkVqa7Ez1fFD5Xqq+0TO+Mt58bwh2fqP/3dJ7e9Pn/4b7OJlSvz9w+/lA8f3FMq8ij2hHV BIR8A X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Test listns() with LISTNS_CURRENT_USER. List namespaces owned by current user namespace. Signed-off-by: Christian Brauner --- tools/testing/selftests/namespaces/listns_test.c | 33 ++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/tools/testing/selftests/namespaces/listns_test.c b/tools/testing/selftests/namespaces/listns_test.c index 7dff63a00263..457298cb4c64 100644 --- a/tools/testing/selftests/namespaces/listns_test.c +++ b/tools/testing/selftests/namespaces/listns_test.c @@ -168,4 +168,37 @@ TEST(listns_pagination) } } +/* + * Test listns() with LISTNS_CURRENT_USER. + * List namespaces owned by current user namespace. + */ +TEST(listns_current_user) +{ + struct ns_id_req req = { + .size = sizeof(req), + .spare = 0, + .ns_id = 0, + .ns_type = 0, + .spare2 = 0, + .user_ns_id = LISTNS_CURRENT_USER, + }; + __u64 ns_ids[100]; + ssize_t ret; + + ret = sys_listns(&req, ns_ids, ARRAY_SIZE(ns_ids), 0); + if (ret < 0) { + if (errno == ENOSYS) + SKIP(return, "listns() not supported"); + TH_LOG("listns failed: %s (errno=%d)", strerror(errno), errno); + ASSERT_TRUE(false); + } + ASSERT_GE(ret, 0); + + /* Should find at least the initial namespaces if we're in init_user_ns */ + TH_LOG("Found %zd namespaces owned by current user namespace", ret); + + for (ssize_t i = 0; i < ret; i++) + TH_LOG(" [%zd] ns_id: %llu", i, (unsigned long long)ns_ids[i]); +} + TEST_HARNESS_MAIN -- 2.47.3