linux-ext4 - [PATCH v2 2/6] generic/204: remove unnecessary _scratch

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Date:   Wed,  9 Feb 2022 21:33:01 +0900
From:   Shin'ichiro Kawasaki <shinichiro.kawasaki@....com>
To:     fstests@...r.kernel.org, linux-btrfs@...r.kernel.org
Cc:     linux-xfs@...r.kernel.org, linux-ext4@...r.kernel.org,
        Naohiro Aota <naohiro.aota@....com>,
        Johannes Thumshirn <johannes.thumshirn@....com>,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Shin'ichiro Kawasaki <shinichiro.kawasaki@....com>
Subject: [PATCH v2 2/6] generic/204: remove unnecessary _scratch_mkfs call

The test case generic/204 calls _scratch_mkfs to get data block size and
i-node size of the filesystem and obtained data block size is passed to
the following _scratch_mfks_sized call as an option. However, the
_scratch_mkfs call is unnecessary since the sizes can be obtained by
_scratch_mkfs_sized call without the data block size option.

Also the _scratch_mkfs call is harmful when the _scratch_mkfs succeeds
and the _scratch_mkfs_sized fails. In this case, the _scratch_mkfs
leaves valid working filesystem on scratch device then following mount
and IO operations can not detect the failure of _scratch_mkfs_sized.
This results in the test case run with unexpected test condition.

Hence, remove the _scratch_mkfs call and the data block size option for
_scratch_mkfs_sized call.

Suggested-by: Darrick J. Wong <djwong@...nel.org>
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@....com>
---
 tests/generic/204 | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/tests/generic/204 b/tests/generic/204
index a3dabb71..a33a090f 100755
--- a/tests/generic/204
+++ b/tests/generic/204
@@ -24,10 +24,6 @@ _supported_fs generic

 _require_scratch

-# get the block size first
-_scratch_mkfs 2> /dev/null | _filter_mkfs 2> $tmp.mkfs > /dev/null
-. $tmp.mkfs
-
 # For xfs, we need to handle the different default log sizes that different
 # versions of mkfs create. All should be valid with a 16MB log, so use that.
 # And v4/512 v5/1k xfs don't have enough free inodes, set imaxpct=50 at mkfs
@@ -35,7 +31,7 @@ _scratch_mkfs 2> /dev/null | _filter_mkfs 2> $tmp.mkfs > /dev/null
 [ $FSTYP = "xfs" ] && MKFS_OPTIONS="$MKFS_OPTIONS -l size=16m -i maxpct=50"

 SIZE=`expr 115 \* 1024 \* 1024`
-_scratch_mkfs_sized $SIZE $dbsize 2> /dev/null > $tmp.mkfs.raw
+_scratch_mkfs_sized $SIZE 2> /dev/null > $tmp.mkfs.raw
 cat $tmp.mkfs.raw | _filter_mkfs 2> $tmp.mkfs > /dev/null
 _scratch_mount

-- 
2.34.1