[LTP] [PATCH v2] statx/statx04: Skip vfat and exfat filesystems

[Wei Gao]

On newer kernels (v7.1-rc1+), vfat and exfat implement fileattr_get to
support reporting casefolding. This causes the FS_IOC_GETFLAGS ioctl to
return success, whereas on older kernels it returned ENOTTY.

Since FS_IOC_GETFLAGS succeeds, statx04 assumes standard writable inode
attributes (append, immutable, nodump) are supported on these
filesystems. However, they are not, causing the statx() attribute check
to fail with TFAIL.

Fix this by checking if the filesystem type is vfat or exfat and skipping
the test with TCONF.

This addresses the failures introduced by the following upstream Linux
kernel commits:
- 27e0b573dd4a ("exfat: Implement fileattr_get for case sensitivity")
- c92db2ca72fe ("fat: Implement fileattr_get for case sensitivity")

Signed-off-by: Wei Gao <wegao@suse.com>
---
 testcases/kernel/syscalls/statx/statx04.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/testcases/kernel/syscalls/statx/statx04.c b/testcases/kernel/syscalls/statx/statx04.c
index af30a200e..b2a2ac9cc 100644
--- a/testcases/kernel/syscalls/statx/statx04.c
+++ b/testcases/kernel/syscalls/statx/statx04.c
@@ -91,6 +91,15 @@ static void setup(void)
 	if (TST_RET)
 		tst_brk(TBROK | TTERRNO, "Unexpected ioctl() error");
 
+	/*
+	 * On newer kernels (v7.1-rc1+), vfat and exfat implement fileattr_get
+	 * to support reporting casefolding, which causes FS_IOC_GETFLAGS to
+	 * return success. However, they do not support standard writable inode
+	 * attributes (append, immutable, nodump). Skip them.
+	 */
+	if (!strcmp(tst_device->fs_type, "vfat") || !strcmp(tst_device->fs_type, "exfat"))
+		tst_brk(TCONF, "vfat and exfat do not support standard attributes");
+
 	for (i = 0, expected_mask = 0; i < ARRAY_SIZE(attr_list); i++)
 		expected_mask |= attr_list[i].attr;
 
-- 
2.54.0