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selftest/mm: skip if fallocate() is unsupported in gup_longterm

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Currently gup_longterm assumes that filesystems support fallocate() and
uses that to allocate space in files, however this is an optional feature
and is in particular not implemented by NFSv3 which is commonly used in CI
systems leading to spurious failures.  Check for lack of support and
report a skip instead for that case.

Link: https://lkml.kernel.org/r/20250613-selftest-mm-gup-longterm-fallocate-nfs-v1-1-758a104c175f@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Mark Brown 2025-06-13 12:44:07 +01:00 committed by Andrew Morton
parent 4535cb331c
commit 3e49aa8e65
1 changed files with 9 additions and 1 deletions
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10
tools/testing/selftests/mm/gup_longterm.c
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@ -114,7 +114,15 @@ static void do_test(int fd, size_t size, enum test_type type, bool shared)
}
if (fallocate(fd, 0, 0, size)) {
if (size == pagesize) {
/*
* Some filesystems (eg, NFSv3) don't support
* fallocate(), report this as a skip rather than a
* test failure.
*/
if (errno == EOPNOTSUPP) {
ksft_print_msg("fallocate() not supported by filesystem\n");
result = KSFT_SKIP;
} else if (size == pagesize) {
ksft_print_msg("fallocate() failed (%s)\n", strerror(errno));
result = KSFT_FAIL;
} else {