ubi-tests: ubi_mkvol_request: Fully initialize 'struct ubi_mkvol_request req'

'struct ubi_mkvol_request req' is one parameter of the function 'ubi_mkvol'
, this parameter will be passed to kernel and then be checked. It acts as a
local variable in many ubi tests, such as io_basic, io_read, mkvol_bad,
mkvol_basic, etc.

After commit c355aa465fce ("ubi: expose the volume CRC check skip flag") in
linux-stable, 'struct ubi_mkvol_request' supports a new configuration named
'flags', and req.flags will be checked in kernel function
'verify_mkvol_req'. Currently, there is no initialization for req.flags
before 'ubi_mkvol' invoked. So, req.flags can be an arbitrary number passed
to kernel. When we run ubi tests in qemu (x86_64, kernel image: 5.2.0-rc4),
the following errors may occur:

  ======================================================================
  ======================================================================
  ======================================================================
  Test on mtdram, fastmap enabled, VID header offset factor 1
  ======================================================================
  ======================================================================
  ======================================================================
  mtdram: 16MiB, PEB size 16KiB, fastmap enabled
  Running mkvol_basic /dev/ubi0
  Running mkvol_bad /dev/ubi0
  [mkvol_bad] test_mkvol():105: ubi_mkvol failed with error 22
  (Invalid argument), expected 28 (No space left on device)
  [mkvol_bad] test_mkvol():105: bytes = 16060929
  Error: mkvol_bad failed
  FAILURE

This patch fully initializes every 'struct ubi_mkvol_request req' passed to
'ubi_mkvol', which can fix the bug that the ubi test failed caused by that
req.flags was not initialized. And it is still compatible with old kernel
before kernel commit c355aa465fce ("ubi: expose the volume CRC check skip
flag").

----------------------------------------

Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 2 insertions, 0 deletions

diff --git a/tests/ubi-tests/rsvol.c b/tests/ubi-tests/rsvol.c
index 6bfade9..921b36f 100644
--- a/tests/ubi-tests/rsvol.c
+++ b/tests/ubi-tests/rsvol.c
@@ -54,6 +54,7 @@ static int test_basic(int type)
 	req.bytes = MIN_AVAIL_EBS * dev_info.leb_size;
 	req.vol_type = type;
 	req.name = name;
+	req.flags = 0;
 
 	if (ubi_mkvol(libubi, node, &req)) {
 		failed("ubi_mkvol");
@@ -237,6 +238,7 @@ static int test_rsvol(int type)
 		req.vol_id = UBI_VOL_NUM_AUTO;
 		req.vol_type = type;
 		req.name = name;
+		req.flags = 0;
 
 		req.alignment = alignments[i];
 		req.alignment -= req.alignment % dev_info.min_io_size;