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Fri, 19 May 2023 06:27:36 -0400 X-MC-Unique: noILZ21kOdC-g25uQy8reA-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id CB8361C04B50; Fri, 19 May 2023 10:27:35 +0000 (UTC) Received: from t480s.redhat.com (unknown [10.39.194.84]) by smtp.corp.redhat.com (Postfix) with ESMTP id F08C62166B25; Fri, 19 May 2023 10:27:32 +0000 (UTC) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linux-kselftest@vger.kernel.org, David Hildenbrand , Andrew Morton , Shuah Khan , Lorenzo Stoakes , Jens Axboe , Peter Xu , Jason Gunthorpe , John Hubbard , Jan Kara Subject: [PATCH v1 3/3] selftests/mm: gup_longterm: add liburing tests Date: Fri, 19 May 2023 12:27:23 +0200 Message-Id: <20230519102723.185721-4-david@redhat.com> In-Reply-To: <20230519102723.185721-1-david@redhat.com> References: <20230519102723.185721-1-david@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.1 on 10.11.54.6 X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 7075940005 X-Stat-Signature: ewfgjzm3ydjabxog7hd46fdmmta1ot3y X-Rspam-User: X-HE-Tag: 1684492062-352524 X-HE-Meta: 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 XVCowaRw MNXyq9lDFFWPJW1gVcwqg6ZuJhOP3x7FPD2U2b2bUTUcVuA/5CB+BoC8dmbFOuLggkfuB8Buank7n2zADY75X+ZEqeAnJXRMyZynJP7iLtPoaknh9XXxa9HXfgxtD1tGLzC0aByIHwHrZ4iRLli9Kp1051u8G16gIy6IJJcxVrxUKYimmM59P9DtbUeJSc0FvYx4P93wGzaHpgGmcHe+Y6HG16litJzaHAwRU X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Similar to the COW selftests, also use io_uring fixed buffers to test if long-term page pinning works as expected. Signed-off-by: David Hildenbrand --- tools/testing/selftests/mm/gup_longterm.c | 73 +++++++++++++++++++++++ 1 file changed, 73 insertions(+) diff --git a/tools/testing/selftests/mm/gup_longterm.c b/tools/testing/selftests/mm/gup_longterm.c index 44a3617fd423..d33d3e68ffab 100644 --- a/tools/testing/selftests/mm/gup_longterm.c +++ b/tools/testing/selftests/mm/gup_longterm.c @@ -22,6 +22,9 @@ #include #include "local_config.h" +#ifdef LOCAL_CONFIG_HAVE_LIBURING +#include +#endif /* LOCAL_CONFIG_HAVE_LIBURING */ #include "../../../../mm/gup_test.h" #include "../kselftest.h" @@ -80,6 +83,9 @@ enum test_type { TEST_TYPE_RO_FAST, TEST_TYPE_RW, TEST_TYPE_RW_FAST, +#ifdef LOCAL_CONFIG_HAVE_LIBURING + TEST_TYPE_IOURING, +#endif /* LOCAL_CONFIG_HAVE_LIBURING */ }; static void do_test(int fd, size_t size, enum test_type type, bool shared) @@ -173,6 +179,51 @@ static void do_test(int fd, size_t size, enum test_type type, bool shared) ksft_test_result(should_work, "Should have worked\n"); break; } +#ifdef LOCAL_CONFIG_HAVE_LIBURING + case TEST_TYPE_IOURING: { + struct io_uring ring; + struct iovec iov; + + /* io_uring always pins pages writable. */ + if (shared && fs_is_unknown(fs_type)) { + ksft_test_result_skip("Unknown filesystem\n"); + return; + } + should_work = !shared || + fs_supports_writable_longterm_pinning(fs_type); + + /* Skip on errors, as we might just lack kernel support. */ + ret = io_uring_queue_init(1, &ring, 0); + if (ret < 0) { + ksft_test_result_skip("io_uring_queue_init() failed\n"); + break; + } + /* + * Register the range as a fixed buffer. This will FOLL_WRITE | + * FOLL_PIN | FOLL_LONGTERM the range. + */ + iov.iov_base = mem; + iov.iov_len = size; + ret = io_uring_register_buffers(&ring, &iov, 1); + /* Only new kernels return EFAULT. */ + if (ret && (errno == ENOSPC || errno == EOPNOTSUPP || + errno == EFAULT)) { + ksft_test_result(!should_work, "Should have failed\n"); + } else if (ret) { + /* + * We might just lack support or have insufficient + * MEMLOCK limits. + */ + ksft_test_result_skip("io_uring_register_buffers() failed\n"); + } else { + ksft_test_result(should_work, "Should have worked\n"); + io_uring_unregister_buffers(&ring); + } + + io_uring_queue_exit(&ring); + break; + } +#endif /* LOCAL_CONFIG_HAVE_LIBURING */ default: assert(false); } @@ -310,6 +361,18 @@ static void test_private_ro_fast_pin(int fd, size_t size) do_test(fd, size, TEST_TYPE_RO_FAST, false); } +#ifdef LOCAL_CONFIG_HAVE_LIBURING +static void test_shared_iouring(int fd, size_t size) +{ + do_test(fd, size, TEST_TYPE_IOURING, true); +} + +static void test_private_iouring(int fd, size_t size) +{ + do_test(fd, size, TEST_TYPE_IOURING, false); +} +#endif /* LOCAL_CONFIG_HAVE_LIBURING */ + static const struct test_case test_cases[] = { { "R/W longterm GUP pin in MAP_SHARED file mapping", @@ -343,6 +406,16 @@ static const struct test_case test_cases[] = { "R/O longterm GUP-fast pin in MAP_PRIVATE file mapping", test_private_ro_fast_pin, }, +#ifdef LOCAL_CONFIG_HAVE_LIBURING + { + "io_uring fixed buffer with MAP_SHARED file mapping", + test_shared_iouring, + }, + { + "io_uring fixed buffer with MAP_PRIVATE file mapping", + test_private_iouring, + }, +#endif /* LOCAL_CONFIG_HAVE_LIBURING */ }; static void run_test_case(struct test_case const *test_case) -- 2.40.1