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Mon, 27 Apr 2026 23:42:55 -0700 (PDT) Message-ID: <71447b65-0390-47a6-b0ec-7727a3009256@gmail.com> Date: Tue, 28 Apr 2026 14:42:51 +0800 Precedence: bulk X-Mailing-List: linux-ext4@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 1/9] fstests: add _loop_image_create_clone() helper To: Amir Goldstein , Anand Jain Cc: fstests@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-f2fs@vger.kernel.org, zlang@redhat.com, hch@infradead.org References: <05ace38b54ea49f462bcd6274c4a2528192e6949.1777281778.git.asj@kernel.org> Content-Language: en-US From: Anand Jain In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 28/4/26 02:31, Amir Goldstein wrote: > On Mon, Apr 27, 2026 at 12:19 PM Anand Jain wrote: >> >> Introduce _loop_image_create_clone() and _loop_image_destroy() to mkfs an >> image file and clone it to another image file, and attach a loop device to >> them. And its destroy part. >> >> Signed-off-by: Anand Jain >> --- >> common/rc | 44 ++++++++++++++++++++++++++++++++++++++++++++ >> 1 file changed, 44 insertions(+) >> >> diff --git a/common/rc b/common/rc >> index 9632b211b58f..0e7b7eb1d98f 100644 >> --- a/common/rc >> +++ b/common/rc >> @@ -1503,6 +1503,50 @@ _scratch_resvblks() >> esac >> } >> >> +_loop_image_create_clone() >> +{ >> + local -n _ret=$1 >> + local pre_clone_tune_func=$2 >> + local img_file=$TEST_DIR/${seq}.img >> + local img_file_clone=$TEST_DIR/${seq}_clone.img >> + local size=$(_small_fs_size_mb 128) # Smallest possible >> + local loop_devs >> + >> + size=$((size * 1024 * 1024)) >> + $XFS_IO_PROG -f -c "truncate $size" $img_file >> + >> + loop_devs=$(_create_loop_device $img_file) >> + _ret=($loop_devs) >> + >> + case $FSTYP in >> + xfs) >> + _mkfs_dev "-s size=4096" $img_file >> + ;; >> + btrfs) >> + _mkfs_dev $img_file >> + ;; >> + *) >> + _mkfs_dev $img_file > > You making a wrong assumption that FSTYP can format the loop devices > > You should add _require_block_device $SCRATCH_DEV > to all your tests or maybe nicer, add: > > _require_loop_mountable which requires loop and block dev fs > and use this requirement instead of just _require_loop in all tests. > Thanks. I've fixed this in v4 by adding _require_block_device $TEST_DEV Since SCRATCH_DEV is not required. I didn't create a new _require_loop_mountable() helper. Both _require_loop() and _require_block_device() are used both together across other existing tests; I prefer not to deviate into cleaning that up in this patch set. v4 is in the ML for rvb. Thanks, Anand > Thanks, > Amir.