From: Brendan Jackman <jackmanb@google.com>
Date: Fri, 21 Feb 2025 18:25:48 +0000 (+0000)
Subject: selftests/mm: skip gup_longerm tests on weird filesystems
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=8cba1c61017f16c908d269b8dd6410a371cb6cfd;p=users%2Fjedix%2Flinux-maple.git

selftests/mm: skip gup_longerm tests on weird filesystems

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

Link: https://lkml.kernel.org/r/20250221-mm-selftests-v2-9-28c4d66383c5@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 (Samsung OSG) <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/tools/testing/selftests/mm/gup_longterm.c b/tools/testing/selftests/mm/gup_longterm.c
index 879e9e4e8cce..d2c33dd9da9c 100644
--- a/tools/testing/selftests/mm/gup_longterm.c
+++ b/tools/testing/selftests/mm/gup_longterm.c
@@ -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");
+		} else {
+			ksft_test_result_fail("ftruncate() failed (%s)\n", strerror(errno));
+		}
 		return;
 	}