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Date: Mon, 16 May 2022 14:15:05 +0530 From: Ojaswin Mujoo <ojaswin@...ux.ibm.com> To: fstests@...r.kernel.org Cc: zlang@...hat.com, riteshh@...ux.ibm.com, linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH v3] common/rc: Modify _require_batched_discard to improve test coverage A recent ext4 patch discussed [1] that some devices (eg LVMs) can have a discard granularity as big as 42MB which makes it larger than the group size of ext4 FS with 1k BS. This causes the FITRIM IOCTL to fail. This case was not correctly handled by this test since "_require_batched_discard" incorrectly interpreted the FITRIM failure as SCRATCH_DEV not supporting the IOCTL. This caused the test to report "not run" instead of "failed" in case of large discard granularity. Fix "_require_batched_discard" to use a more accurate method to determine if discard is supported. [1] commit 173b6e383d2 ext4: avoid trim error on fs with small groups Signed-off-by: Ojaswin Mujoo <ojaswin@...ux.ibm.com> Reviewed-by: Ritesh Harjani <riteshh@...ux.ibm.com> --- Changes since v2 [1] * Eliminated redundant $ret variable [1] https://lore.kernel.org/all/20220516063951.87838-1-ojaswin@linux.ibm.com/ common/rc | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/common/rc b/common/rc index e2d3d72a..94344248 100644 --- a/common/rc +++ b/common/rc @@ -3858,7 +3858,12 @@ _require_batched_discard() exit 1 fi _require_fstrim - $FSTRIM_PROG $1 > /dev/null 2>&1 || _notrun "FITRIM not supported on $1" + + grep -q "not supported" <($FSTRIM_PROG $1 2>&1) + if [ "$?" = "0" ] + then + _notrun "FITRIM not supported on $1" + fi } _require_dumpe2fs() -- 2.27.0
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