The patch titled
Subject: userfaultfd: selftests: modify selftest to use /dev/userfaultfd
has been added to the -mm mm-unstable branch. Its filename is
userfaultfd-selftests-modify-selftest-to-use-dev-userfaultfd-v7.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/userfaultfd-selftests-modify-selftest-to-use-dev-userfaultfd-v7.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Axel Rasmussen <axelrasmussen@xxxxxxxxxx>
Subject: userfaultfd: selftests: modify selftest to use /dev/userfaultfd
Date: Fri, 19 Aug 2022 13:51:59 -0700
modify selftest to exit with KSFT_SKIP *only* when features are
unsupported, exiting with 1 in other error cases, per Mike
Link: https://lkml.kernel.org/r/20220819205201.658693-4-axelrasmussen@xxxxxxxxxx
Signed-off-by: Axel Rasmussen <axelrasmussen@xxxxxxxxxx>
Acked-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Acked-by: Peter Xu <peterx@xxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Dmitry V. Levin <ldv@xxxxxxxxxxxx>
Cc: Gleb Fotengauer-Malinovskiy <glebfm@xxxxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Jan Kara <jack@xxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxx>
Cc: Nadav Amit <namit@xxxxxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Cc: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
Cc: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Zhang Yi <yi.zhang@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/vm/userfaultfd.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
--- a/tools/testing/selftests/vm/userfaultfd.c~userfaultfd-selftests-modify-selftest-to-use-dev-userfaultfd-v7
+++ a/tools/testing/selftests/vm/userfaultfd.c
@@ -402,13 +402,16 @@ static void assert_expected_ioctls_prese
static int __userfaultfd_open_dev(void)
{
- int fd, _uffd = -1;
+ int fd, _uffd;
fd = open("/dev/userfaultfd", O_RDWR | O_CLOEXEC);
if (fd < 0)
- return -1;
+ errexit(KSFT_SKIP, "opening /dev/userfaultfd failed");
_uffd = ioctl(fd, USERFAULTFD_IOC_NEW, UFFD_FLAGS);
+ if (_uffd < 0)
+ errexit(errno == ENOTTY ? KSFT_SKIP : 1,
+ "creating userfaultfd failed");
close(fd);
return _uffd;
}
@@ -419,10 +422,12 @@ static void userfaultfd_open(uint64_t *f
if (test_dev_userfaultfd)
uffd = __userfaultfd_open_dev();
- else
+ else {
uffd = syscall(__NR_userfaultfd, UFFD_FLAGS);
- if (uffd < 0)
- errexit(KSFT_SKIP, "creating userfaultfd failed");
+ if (uffd < 0)
+ errexit(errno == ENOSYS ? KSFT_SKIP : 1,
+ "creating userfaultfd failed");
+ }
uffd_flags = fcntl(uffd, F_GETFD, NULL);
uffdio_api.api = UFFD_API;
_
Patches currently in -mm which might be from axelrasmussen@xxxxxxxxxx are
selftests-vm-add-hugetlb_shared-userfaultfd-test-to-run_vmtestssh.patch
userfaultfd-add-dev-userfaultfd-for-fine-grained-access-control.patch
userfaultfd-add-dev-userfaultfd-for-fine-grained-access-control-v7.patch
userfaultfd-selftests-modify-selftest-to-use-dev-userfaultfd.patch
userfaultfd-selftests-modify-selftest-to-use-dev-userfaultfd-v7.patch
userfaultfd-update-documentation-to-describe-dev-userfaultfd.patch
userfaultfd-update-documentation-to-describe-dev-userfaultfd-v7.patch
selftests-vm-add-dev-userfaultfd-test-cases-to-run_vmtestssh.patch
