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 A99FA336EF8; Tue, 21 Oct 2025 11:47:06 +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=1761047226; cv=none; b=TUjhINvofjZAnjkLys2tY6BHXLrhyMbHLEkjo9lNXTeYB5QglpN/LnL3OzrkdFwm/Wzq3eASdaT6h6lCgQiL3fJyaOTT/hhL9BoQtJIOvkgUeQe4qF2qwhpx67UV9u3pqVwgj0bnfYnYITQEDjsf8rO4oDG7hZ+sX76apDaGRlU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761047226; c=relaxed/simple; bh=16wgRCEaRGE6KnaGWYUsE3X1jinLIZr1ZBK0aXw4RfM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=H1M947X0G5b2MYXtqt8DODaSs57M8FFbR2Qe4LkCDDw2zpg/CdrNHqiGyEZ5rdXOCACCX4WJE0KfOaqpXAp8MU8tna3JW9Lp2jqtR9euc1LSsvJWxouUYuKjKWAWOuAQ0YmD7UjlCvKNBXyqh3v8MP++/89XIjWQf1M056jP1/M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YVozDYc2; 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="YVozDYc2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 945F0C4CEF1; Tue, 21 Oct 2025 11:47:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761047226; bh=16wgRCEaRGE6KnaGWYUsE3X1jinLIZr1ZBK0aXw4RfM=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=YVozDYc2BWlZUf8wYFVhvmQ7lLAh6Wrd8xi0neNvo50eImcWhBWUi5OmVXAPeelf1 JJA6V4IEpS3GF3Gg18qzz3pfIIg+ZGaIyou61yvhnMEOQg5BP1HHm0qz2Eq7qgjBTw o9MixiTl6MVHGYHu1MLTlNadve2ow5rsoXtkBZjKB9yyRf77vsIciuiEAIhD41xpRW mdz6MLapzT/AZbe4VEz5z9j3Gf8xtq8pMlBBaTE4mDAG+LI/ekF0SNKS24cD0qY6zn Vn+xpp1uBVkQeYj0ICXSdfPHZp/ihnZiNmHrlGtWeDCXVTYM3ThOUyoXxgyrnATUuB 0723rs55b8+nA== From: Christian Brauner Date: Tue, 21 Oct 2025 13:43:43 +0200 Subject: [PATCH RFC DRAFT 37/50] selftests/namespaces: third listns() test Precedence: bulk X-Mailing-List: bpf@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: <20251021-work-namespace-nstree-listns-v1-37-ad44261a8a5b@kernel.org> References: <20251021-work-namespace-nstree-listns-v1-0-ad44261a8a5b@kernel.org> In-Reply-To: <20251021-work-namespace-nstree-listns-v1-0-ad44261a8a5b@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=2006; i=brauner@kernel.org; h=from:subject:message-id; bh=16wgRCEaRGE6KnaGWYUsE3X1jinLIZr1ZBK0aXw4RfM=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWR8L3y335I7mPUwu4etyPWj761KUnkEOTWCxPR3bl38K vaCucKKjlIWBjEuBlkxRRaHdpNwueU8FZuNMjVg5rAygQxh4OIUgIno8jIyHBGs5xP2UntiqdA7 O3YVy6pPCSuWBm/lntT1/8eDZX0hXxn+ij6OqYleaLSz8uaGrRGeq9iOnvJsqjoSkHtMsdbz2dE LTAA= X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Test listns() pagination. List namespaces in batches. Signed-off-by: Christian Brauner --- tools/testing/selftests/namespaces/listns_test.c | 53 ++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/tools/testing/selftests/namespaces/listns_test.c b/tools/testing/selftests/namespaces/listns_test.c index 64249502ac49..7dff63a00263 100644 --- a/tools/testing/selftests/namespaces/listns_test.c +++ b/tools/testing/selftests/namespaces/listns_test.c @@ -115,4 +115,57 @@ TEST(listns_filter_by_type) } } +/* + * Test listns() pagination. + * List namespaces in batches. + */ +TEST(listns_pagination) +{ + struct ns_id_req req = { + .size = sizeof(req), + .spare = 0, + .ns_id = 0, + .ns_type = 0, + .spare2 = 0, + .user_ns_id = 0, + }; + __u64 batch1[2], batch2[2]; + ssize_t ret1, ret2; + + /* Get first batch */ + ret1 = sys_listns(&req, batch1, ARRAY_SIZE(batch1), 0); + if (ret1 < 0) { + if (errno == ENOSYS) + SKIP(return, "listns() not supported"); + TH_LOG("listns failed: %s (errno=%d)", strerror(errno), errno); + ASSERT_TRUE(false); + } + ASSERT_GE(ret1, 0); + + if (ret1 == 0) + SKIP(return, "No namespaces found"); + + TH_LOG("First batch: %zd namespaces", ret1); + + /* Get second batch using last ID from first batch */ + if (ret1 == ARRAY_SIZE(batch1)) { + req.ns_id = batch1[ret1 - 1]; + ret2 = sys_listns(&req, batch2, ARRAY_SIZE(batch2), 0); + ASSERT_GE(ret2, 0); + + TH_LOG("Second batch: %zd namespaces (after ns_id=%llu)", + ret2, (unsigned long long)req.ns_id); + + /* If we got more results, verify IDs are monotonically increasing */ + if (ret2 > 0) { + ASSERT_GT(batch2[0], batch1[ret1 - 1]); + TH_LOG("Pagination working: %llu > %llu", + (unsigned long long)batch2[0], + (unsigned long long)batch1[ret1 - 1]); + } + } else { + TH_LOG("All namespaces fit in first batch"); + } +} + TEST_HARNESS_MAIN -- 2.47.3