[LTP] [PATCH] syscalls/statx01: Update the stx_blocks check

[Cyril Hrubis]

After talking with Jan Kara we decided that the previous check wasn't
100% right.

* In some cases the data for small files can be stored along with the
  file metadata and in such case the number of allocated blocks would be
  zero.

* I've been assured that the filesystem blocks size is <= than the
  optimal transfer block size and while the definition for stx_blksize
  is quite vague it should be good enough for the test.

  Note that we also rely on the fact that we write 256 bytes to the
  file, which is smaller than any known block size, so at most one block
  would be allocated.

Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
CC: Jan Kara <jack@suse.cz>
---
 testcases/kernel/syscalls/statx/statx01.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/testcases/kernel/syscalls/statx/statx01.c b/testcases/kernel/syscalls/statx/statx01.c
index 806cea636..574560b5d 100644
--- a/testcases/kernel/syscalls/statx/statx01.c
+++ b/testcases/kernel/syscalls/statx/statx01.c
@@ -90,7 +90,7 @@ static void test_normal_file(void)
 			buff.stx_mode, MODE);
 
 
-	if (buff.stx_blocks > 0 && buff.stx_blocks <= 128)
+	if (buff.stx_blocks <= buff.stx_blksize/512)
 		tst_res(TPASS, "stx_blocks(%"PRIu64") is valid",
 			buff.stx_blocks);
 	else
-- 
2.16.4