Re: [PATCH v3] btrfs: Add new test for qgroup assign functionality

[Qu Wenruo <wqu@suse.com>]

On 2020/9/24 下午12:11, Sidong Yang wrote:
> This new test will test btrfs's qgroup assign functionality. The
> test has 3 cases.
> 
>  - assign, no shared extents
>  - assign, shared extents
>  - snapshot -i, shared extents
> 
> Each cases create subvolumes and assign qgroup in their own way
> and check with the command "btrfs check".
> 
> Cc: Qu Wenruo <wqu@suse.com>
> Cc: Eryu Guan <guan@eryu.me>
> 
> Signed-off-by: Sidong Yang <realwakka@gmail.com>

This version is much better overall.

The remaining small problems are mostly fstests related then.
...
> +# Test assign qgroup for submodule with shared extents by reflink
> +assign_shared_test()
> +{
> +	_scratch_mkfs > /dev/null 2>&1
> +	_scratch_mount
> +
> +	echo "=== qgroup assign shared test ===" >> $seqres.full
> +	$BTRFS_UTIL_PROG quota enable $SCRATCH_MNT
> +	$BTRFS_UTIL_PROG quota rescan -w $SCRATCH_MNT >> $seqres.full
> +
> +	$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/a >> $seqres.full
> +	$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/b >> $seqres.full
> +
> +	_ddt of="$SCRATCH_MNT"/a/file1 bs=1M count=1 >> $seqres.full 2>&1
> +	cp --reflink=always "$SCRATCH_MNT"/a/file1 "$SCRATCH_MNT"/b/file1
> +
> +	$BTRFS_UTIL_PROG qgroup create 1/100 $SCRATCH_MNT
> +	$BTRFS_UTIL_PROG qgroup assign $SCRATCH_MNT/a 1/100 $SCRATCH_MNT
> +	$BTRFS_UTIL_PROG qgroup assign $SCRATCH_MNT/b 1/100 $SCRATCH_MNT
> +
> +	_scratch_unmount
> +	$BTRFS_UTIL_PROG check $SCRATCH_DEV >> $seqres.full 2>&1

We have _check_scratch_fs() function to do it properly already.

> +	[ $? -eq 0 ] || _fail "btrfs check failed"
> +}
> +
> +# Test assign qgroup for submodule without shared extents
> +assign_no_shared_test()
> +{
> +	_scratch_mkfs > /dev/null 2>&1
> +	_scratch_mount
> +
> +	echo "=== qgroup assign no shared test ===" >> $seqres.full
> +	$BTRFS_UTIL_PROG quota enable $SCRATCH_MNT

It's recommended to call "quota rescan -w" to ensure we finished rescan.

As fast enough system can go to next command before the auto rescan even
finished.

Not sure if Eryu would have extra comments.

Thanks,
Qu

> +	$BTRFS_UTIL_PROG qgroup create 1/100 $SCRATCH_MNT
> +
> +	$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/a >> $seqres.full
> +	$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/b >> $seqres.full
> +
> +	$BTRFS_UTIL_PROG qgroup assign $SCRATCH_MNT/a 1/100 $SCRATCH_MNT
> +	$BTRFS_UTIL_PROG qgroup assign $SCRATCH_MNT/b 1/100 $SCRATCH_MNT
> +	_scratch_unmount
> +
> +	$BTRFS_UTIL_PROG check $SCRATCH_DEV >> $seqres.full 2>&1
> +	[ $? -eq 0 ] || _fail "btrfs check failed"
> +}
> +
> +# Test snapshot with assigning qgroup for submodule
> +snapshot_test()
> +{
> +	_scratch_mkfs > /dev/null 2>&1
> +	_scratch_mount
> +
> +	echo "=== qgroup snapshot test ===" >> $seqres.full
> +	$BTRFS_UTIL_PROG quota enable $SCRATCH_MNT
> +	$BTRFS_UTIL_PROG quota rescan -w $SCRATCH_MNT >> $seqres.full
> +
> +	$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/a >> $seqres.full
> +	_ddt of="$SCRATCH_MNT"/a/file1 bs=1M count=1 >> $seqres.full 2>&1
> +	subvolid=$(_btrfs_get_subvolid $SCRATCH_MNT a)
> +	$BTRFS_UTIL_PROG subvolume snapshot -i 0/$subvolid $SCRATCH_MNT/a $SCRATCH_MNT/b >> $seqres.full
> +	_scratch_unmount
> +
> +	$BTRFS_UTIL_PROG check $SCRATCH_DEV >> $seqres.full 2>&1
> +	[ $? -eq 0 ] || _fail "btrfs check failed"
> +}
> +
> +
> +assign_no_shared_test
> +
> +assign_shared_test
> +
> +snapshot_test
> +
> +# success, all done
> +echo "Silence is golden"
> +status=0
> +exit
> diff --git a/tests/btrfs/221.out b/tests/btrfs/221.out
> new file mode 100644
> index 00000000..aa4351cd
> --- /dev/null
> +++ b/tests/btrfs/221.out
> @@ -0,0 +1,2 @@
> +QA output created by 221
> +Silence is golden
> diff --git a/tests/btrfs/group b/tests/btrfs/group
> index 1b5fa695..cdda38f3 100644
> --- a/tests/btrfs/group
> +++ b/tests/btrfs/group
> @@ -222,3 +222,4 @@
>  218 auto quick volume
>  219 auto quick volume
>  220 auto quick
> +221 auto quick qgroup
>