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selftests/mm: skip gup_longterm tests on weird filesystems

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Some filesystems don't support ftruncate()ing unlinked files.  They return
ENOENT.  In that case, skip the test.

Link: https://lkml.kernel.org/r/20250311-mm-selftests-v4-8-dec210a658f5@google.com
Signed-off-by: Brendan Jackman <jackmanb@google.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Mateusz Guzik <mjguzik@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Brendan Jackman 2025-03-11 13:18:19 +00:00 committed by Andrew Morton
parent 571a4b62ed
commit 32b42970e8
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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@ -96,7 +96,15 @@ static void do_test(int fd, size_t size, enum test_type type, bool shared)
int ret;
if (ftruncate(fd, size)) {
ksft_test_result_fail("ftruncate() failed (%s)\n", strerror(errno));
if (errno == ENOENT) {
/*
* This can happen if the file has been unlinked and the
* filesystem doesn't support truncating unlinked files.
*/
ksft_test_result_skip("ftruncate() failed with ENOENT\n");
} else {
ksft_test_result_fail("ftruncate() failed (%s)\n", strerror(errno));
}
return;
}