The quilt patch titled
Subject: selftests/mm: UFFDIO_API test
has been removed from the -mm tree. Its filename was
selftests-mm-uffdio_api-test.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Peter Xu <peterx@xxxxxxxxxx>
Subject: selftests/mm: UFFDIO_API test
Date: Wed, 12 Apr 2023 12:42:57 -0400
Add one simple test for UFFDIO_API. With that, I also added a bunch of
small but handy helpers along the way.
Link: https://lkml.kernel.org/r/20230412164257.328375-1-peterx@xxxxxxxxxx
Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
Cc: Axel Rasmussen <axelrasmussen@xxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Dmitry Safonov <0x7f454c46@xxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Cc: Zach O'Keefe <zokeefe@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/mm/uffd-unit-tests.c | 109 ++++++++++++++++-
1 file changed, 108 insertions(+), 1 deletion(-)
--- a/tools/testing/selftests/mm/uffd-unit-tests.c~selftests-mm-uffdio_api-test
+++ a/tools/testing/selftests/mm/uffd-unit-tests.c
@@ -9,9 +9,116 @@
#ifdef __NR_userfaultfd
+static void uffd_test_report(void)
+{
+ printf("Userfaults unit tests: pass=%u, skip=%u, fail=%u (total=%u)\n",
+ ksft_get_pass_cnt(),
+ ksft_get_xskip_cnt(),
+ ksft_get_fail_cnt(),
+ ksft_test_num());
+}
+
+static void uffd_test_pass(void)
+{
+ printf("done\n");
+ ksft_inc_pass_cnt();
+}
+
+#define uffd_test_start(...) do { \
+ printf("Testing "); \
+ printf(__VA_ARGS__); \
+ printf("... "); \
+ fflush(stdout); \
+ } while (0)
+
+#define uffd_test_fail(...) do { \
+ printf("failed [reason: "); \
+ printf(__VA_ARGS__); \
+ printf("]\n"); \
+ ksft_inc_fail_cnt(); \
+ } while (0)
+
+#define uffd_test_skip(...) do { \
+ printf("skipped [reason: "); \
+ printf(__VA_ARGS__); \
+ printf("]\n"); \
+ ksft_inc_xskip_cnt(); \
+ } while (0)
+
+/*
+ * Returns 1 if specific userfaultfd supported, 0 otherwise. Note, we'll
+ * return 1 even if some test failed as long as uffd supported, because in
+ * that case we still want to proceed with the rest uffd unit tests.
+ */
+static int test_uffd_api(bool use_dev)
+{
+ struct uffdio_api uffdio_api;
+ int uffd;
+
+ uffd_test_start("UFFDIO_API (with %s)",
+ use_dev ? "/dev/userfaultfd" : "syscall");
+
+ if (use_dev)
+ uffd = uffd_open_dev(UFFD_FLAGS);
+ else
+ uffd = uffd_open_sys(UFFD_FLAGS);
+ if (uffd < 0) {
+ uffd_test_skip("cannot open userfaultfd handle");
+ return 0;
+ }
+
+ /* Test wrong UFFD_API */
+ uffdio_api.api = 0xab;
+ uffdio_api.features = 0;
+ if (ioctl(uffd, UFFDIO_API, &uffdio_api) == 0) {
+ uffd_test_fail("UFFDIO_API should fail with wrong api but didn't");
+ goto out;
+ }
+
+ /* Test wrong feature bit */
+ uffdio_api.api = UFFD_API;
+ uffdio_api.features = BIT_ULL(63);
+ if (ioctl(uffd, UFFDIO_API, &uffdio_api) == 0) {
+ uffd_test_fail("UFFDIO_API should fail with wrong feature but didn't");
+ goto out;
+ }
+
+ /* Test normal UFFDIO_API */
+ uffdio_api.api = UFFD_API;
+ uffdio_api.features = 0;
+ if (ioctl(uffd, UFFDIO_API, &uffdio_api)) {
+ uffd_test_fail("UFFDIO_API should succeed but failed");
+ goto out;
+ }
+
+ /* Test double requests of UFFDIO_API with a random feature set */
+ uffdio_api.features = BIT_ULL(0);
+ if (ioctl(uffd, UFFDIO_API, &uffdio_api) == 0) {
+ uffd_test_fail("UFFDIO_API should reject initialized uffd");
+ goto out;
+ }
+
+ uffd_test_pass();
+out:
+ close(uffd);
+ /* We have a valid uffd handle */
+ return 1;
+}
+
int main(int argc, char *argv[])
{
- return KSFT_PASS;
+ int has_uffd;
+
+ has_uffd = test_uffd_api(false);
+ has_uffd |= test_uffd_api(true);
+
+ if (!has_uffd) {
+ printf("Userfaultfd not supported or unprivileged, skip all tests\n");
+ exit(KSFT_SKIP);
+ }
+ uffd_test_report();
+
+ return ksft_get_fail_cnt() ? KSFT_FAIL : KSFT_PASS;
}
#else /* __NR_userfaultfd */
_
Patches currently in -mm which might be from peterx@xxxxxxxxxx are
selftests-mm-drop-global-mem_fd-in-uffd-tests.patch
selftests-mm-drop-global-hpage_size-in-uffd-tests.patch
selftests-mm-rename-uffd_stats-to-uffd_args.patch
selftests-mm-let-uffd_handle_page_fault-take-wp-parameter.patch
selftests-mm-allow-allocate_area-to-fail-properly.patch
selftests-mm-add-framework-for-uffd-unit-test.patch
selftests-mm-move-uffd-pagemap-test-to-unit-test.patch
selftests-mm-move-uffd-minor-test-to-unit-test.patch
selftests-mm-move-uffd-sig-events-tests-into-uffd-unit-tests.patch
selftests-mm-move-zeropage-test-into-uffd-unit-tests.patch
selftests-mm-workaround-no-way-to-detect-uffd-minor-wp.patch
selftests-mm-allow-uffd-test-to-skip-properly-with-no-privilege.patch
selftests-mm-drop-sys-dev-test-in-uffd-stress-test.patch
selftests-mm-add-shmem-private-test-to-uffd-stress.patch
selftests-mm-add-uffdio-register-ioctls-test.patch
mm-hugetlb-fix-uffd-wp-during-fork.patch
mm-hugetlb-fix-uffd-wp-bit-lost-when-unsharing-happens.patch
selftests-mm-add-a-few-options-for-uffd-unit-test.patch
selftests-mm-extend-and-rename-uffd-pagemap-test.patch
selftests-mm-rename-cow_extra_libs-to-iouring_extra_libs.patch
selftests-mm-add-tests-for-ro-pinning-vs-fork.patch
