diff mbox series

[02/18] iotests: Replace IMGOPTS by _unsupported_imgopts

Message ID 20190927094242.11152-3-mreitz@redhat.com
State New
Headers show
Series iotests: Allow ./check -o data_file | expand

Commit Message

Max Reitz Sept. 27, 2019, 9:42 a.m. UTC
Some tests require compat=1.1 and thus set IMGOPTS='compat=1.1'
globally.  That is not how it should be done; instead, they should
simply set _unsupported_imgopts to compat=0.10 (compat=1.1 is the
default anyway).

This makes the tests heed user-specified $IMGOPTS.  Some do not work
with all image options, though, so we need to disable them accordingly.

Signed-off-by: Max Reitz <mreitz@redhat.com>
---
 tests/qemu-iotests/036 | 3 +--
 tests/qemu-iotests/060 | 4 ++--
 tests/qemu-iotests/062 | 3 ++-
 tests/qemu-iotests/066 | 3 ++-
 tests/qemu-iotests/068 | 3 ++-
 tests/qemu-iotests/098 | 3 +--
 6 files changed, 10 insertions(+), 9 deletions(-)

Comments

Maxim Levitsky Sept. 29, 2019, 4:31 p.m. UTC | #1
On Fri, 2019-09-27 at 11:42 +0200, Max Reitz wrote:
> Some tests require compat=1.1 and thus set IMGOPTS='compat=1.1'
> globally.  That is not how it should be done; instead, they should
> simply set _unsupported_imgopts to compat=0.10 (compat=1.1 is the
> default anyway).
> 
> This makes the tests heed user-specified $IMGOPTS.  Some do not work
> with all image options, though, so we need to disable them accordingly.
> 
> Signed-off-by: Max Reitz <mreitz@redhat.com>
> ---
>  tests/qemu-iotests/036 | 3 +--
>  tests/qemu-iotests/060 | 4 ++--
>  tests/qemu-iotests/062 | 3 ++-
>  tests/qemu-iotests/066 | 3 ++-
>  tests/qemu-iotests/068 | 3 ++-
>  tests/qemu-iotests/098 | 3 +--
>  6 files changed, 10 insertions(+), 9 deletions(-)
> 
> diff --git a/tests/qemu-iotests/036 b/tests/qemu-iotests/036
> index 69d0f9f903..57dda23b02 100755
> --- a/tests/qemu-iotests/036
> +++ b/tests/qemu-iotests/036
> @@ -43,9 +43,8 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
>  # This tests qcow2-specific low-level functionality
>  _supported_fmt qcow2
>  _supported_proto file
> -
>  # Only qcow2v3 and later supports feature bits
> -IMGOPTS="compat=1.1"
> +_unsupported_imgopts 'compat=0.10'
>  
>  echo
>  echo === Image with unknown incompatible feature bit ===
> diff --git a/tests/qemu-iotests/060 b/tests/qemu-iotests/060
> index b91d8321bb..9c2ef42522 100755
> --- a/tests/qemu-iotests/060
> +++ b/tests/qemu-iotests/060
> @@ -48,6 +48,8 @@ _filter_io_error()
>  _supported_fmt qcow2
>  _supported_proto file
>  _supported_os Linux
> +# These tests only work for compat=1.1 images with refcount_bits=16
> +_unsupported_imgopts 'compat=0.10' 'refcount_bits=\([^1]\|.\([^6]\|$\)\)'
>  
>  rt_offset=65536  # 0x10000 (XXX: just an assumption)
>  rb_offset=131072 # 0x20000 (XXX: just an assumption)
> @@ -55,8 +57,6 @@ l1_offset=196608 # 0x30000 (XXX: just an assumption)
>  l2_offset=262144 # 0x40000 (XXX: just an assumption)
>  l2_offset_after_snapshot=524288 # 0x80000 (XXX: just an assumption)
>  
> -IMGOPTS="compat=1.1"
> -
>  OPEN_RW="open -o overlap-check=all $TEST_IMG"
>  # Overlap checks are done before write operations only, therefore opening an
>  # image read-only makes the overlap-check option irrelevant
> diff --git a/tests/qemu-iotests/062 b/tests/qemu-iotests/062
> index d5f818fcce..ac0d2a9a3b 100755
> --- a/tests/qemu-iotests/062
> +++ b/tests/qemu-iotests/062
> @@ -40,8 +40,9 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
>  # This tests qocw2-specific low-level functionality
>  _supported_fmt qcow2
>  _supported_proto generic
> +# We need zero clusters and snapshots
> +_unsupported_imgopts 'compat=0.10' 'refcount_bits=1[^0-9]'
>  
> -IMGOPTS="compat=1.1"
>  IMG_SIZE=64M
>  
>  echo
> diff --git a/tests/qemu-iotests/066 b/tests/qemu-iotests/066
> index 28f8c98412..9a15ba8027 100755
> --- a/tests/qemu-iotests/066
> +++ b/tests/qemu-iotests/066
> @@ -39,9 +39,10 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
>  # This tests qocw2-specific low-level functionality
>  _supported_fmt qcow2
>  _supported_proto generic
> +# Weneed zero clusters and snapshots
Typo
> +_unsupported_imgopts 'compat=0.10' 'refcount_bits=1[^0-9]'
>  
>  # Intentionally create an unaligned image
> -IMGOPTS="compat=1.1"
>  IMG_SIZE=$((64 * 1024 * 1024 + 512))
>  
>  echo
> diff --git a/tests/qemu-iotests/068 b/tests/qemu-iotests/068
> index 22f5ca3ba6..65650fca9a 100755
> --- a/tests/qemu-iotests/068
> +++ b/tests/qemu-iotests/068
> @@ -39,8 +39,9 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
>  # This tests qocw2-specific low-level functionality
>  _supported_fmt qcow2
>  _supported_proto generic
> +# Internal snapshots are (currently) impossible with refcount_bits=1
Why currently? 1 bit will only allow to mark a cluser as used/unused which
is not enough for any snapshots?

> +_unsupported_imgopts 'compat=0.10' 'refcount_bits=1[^0-9]'
>  
> -IMGOPTS="compat=1.1"
>  IMG_SIZE=128K
>  
>  case "$QEMU_DEFAULT_MACHINE" in
> diff --git a/tests/qemu-iotests/098 b/tests/qemu-iotests/098
> index 1c1d1c468f..2d68dc7d6c 100755
> --- a/tests/qemu-iotests/098
> +++ b/tests/qemu-iotests/098
> @@ -40,8 +40,7 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
>  
>  _supported_fmt qcow2
>  _supported_proto file
> -
> -IMGOPTS="compat=1.1"
> +_unsupported_imgopts 'compat=0.10'
Any idea why? I am not familiar with qcow2 well enought to
know but this misses a comment with justification.


>  
>  for event in l1_update empty_image_prepare reftable_update refblock_alloc; do
>  


Best regards,
	Maxim Levitsky
Max Reitz Sept. 30, 2019, 12:59 p.m. UTC | #2
On 29.09.19 18:31, Maxim Levitsky wrote:
> On Fri, 2019-09-27 at 11:42 +0200, Max Reitz wrote:
>> Some tests require compat=1.1 and thus set IMGOPTS='compat=1.1'
>> globally.  That is not how it should be done; instead, they should
>> simply set _unsupported_imgopts to compat=0.10 (compat=1.1 is the
>> default anyway).
>>
>> This makes the tests heed user-specified $IMGOPTS.  Some do not work
>> with all image options, though, so we need to disable them accordingly.
>>
>> Signed-off-by: Max Reitz <mreitz@redhat.com>
>> ---
>>  tests/qemu-iotests/036 | 3 +--
>>  tests/qemu-iotests/060 | 4 ++--
>>  tests/qemu-iotests/062 | 3 ++-
>>  tests/qemu-iotests/066 | 3 ++-
>>  tests/qemu-iotests/068 | 3 ++-
>>  tests/qemu-iotests/098 | 3 +--
>>  6 files changed, 10 insertions(+), 9 deletions(-)
>>
>> diff --git a/tests/qemu-iotests/036 b/tests/qemu-iotests/036
>> index 69d0f9f903..57dda23b02 100755
>> --- a/tests/qemu-iotests/036
>> +++ b/tests/qemu-iotests/036
>> @@ -43,9 +43,8 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
>>  # This tests qcow2-specific low-level functionality
>>  _supported_fmt qcow2
>>  _supported_proto file
>> -
>>  # Only qcow2v3 and later supports feature bits
>> -IMGOPTS="compat=1.1"
>> +_unsupported_imgopts 'compat=0.10'
>>  
>>  echo
>>  echo === Image with unknown incompatible feature bit ===
>> diff --git a/tests/qemu-iotests/060 b/tests/qemu-iotests/060
>> index b91d8321bb..9c2ef42522 100755
>> --- a/tests/qemu-iotests/060
>> +++ b/tests/qemu-iotests/060
>> @@ -48,6 +48,8 @@ _filter_io_error()
>>  _supported_fmt qcow2
>>  _supported_proto file
>>  _supported_os Linux
>> +# These tests only work for compat=1.1 images with refcount_bits=16
>> +_unsupported_imgopts 'compat=0.10' 'refcount_bits=\([^1]\|.\([^6]\|$\)\)'
>>  
>>  rt_offset=65536  # 0x10000 (XXX: just an assumption)
>>  rb_offset=131072 # 0x20000 (XXX: just an assumption)
>> @@ -55,8 +57,6 @@ l1_offset=196608 # 0x30000 (XXX: just an assumption)
>>  l2_offset=262144 # 0x40000 (XXX: just an assumption)
>>  l2_offset_after_snapshot=524288 # 0x80000 (XXX: just an assumption)
>>  
>> -IMGOPTS="compat=1.1"
>> -
>>  OPEN_RW="open -o overlap-check=all $TEST_IMG"
>>  # Overlap checks are done before write operations only, therefore opening an
>>  # image read-only makes the overlap-check option irrelevant
>> diff --git a/tests/qemu-iotests/062 b/tests/qemu-iotests/062
>> index d5f818fcce..ac0d2a9a3b 100755
>> --- a/tests/qemu-iotests/062
>> +++ b/tests/qemu-iotests/062
>> @@ -40,8 +40,9 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
>>  # This tests qocw2-specific low-level functionality
>>  _supported_fmt qcow2
>>  _supported_proto generic
>> +# We need zero clusters and snapshots
>> +_unsupported_imgopts 'compat=0.10' 'refcount_bits=1[^0-9]'
>>  
>> -IMGOPTS="compat=1.1"
>>  IMG_SIZE=64M
>>  
>>  echo
>> diff --git a/tests/qemu-iotests/066 b/tests/qemu-iotests/066
>> index 28f8c98412..9a15ba8027 100755
>> --- a/tests/qemu-iotests/066
>> +++ b/tests/qemu-iotests/066
>> @@ -39,9 +39,10 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
>>  # This tests qocw2-specific low-level functionality
>>  _supported_fmt qcow2
>>  _supported_proto generic
>> +# Weneed zero clusters and snapshots
> Typo

Indeed!

>> +_unsupported_imgopts 'compat=0.10' 'refcount_bits=1[^0-9]'
>>  
>>  # Intentionally create an unaligned image
>> -IMGOPTS="compat=1.1"
>>  IMG_SIZE=$((64 * 1024 * 1024 + 512))
>>  
>>  echo
>> diff --git a/tests/qemu-iotests/068 b/tests/qemu-iotests/068
>> index 22f5ca3ba6..65650fca9a 100755
>> --- a/tests/qemu-iotests/068
>> +++ b/tests/qemu-iotests/068
>> @@ -39,8 +39,9 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
>>  # This tests qocw2-specific low-level functionality
>>  _supported_fmt qcow2
>>  _supported_proto generic
>> +# Internal snapshots are (currently) impossible with refcount_bits=1
> Why currently? 1 bit will only allow to mark a cluser as used/unused which
> is not enough for any snapshots?

It is, because in theory you can just copy the clusters at the time of
snapshotting.  We’ll never implement it, but, well...

>> +_unsupported_imgopts 'compat=0.10' 'refcount_bits=1[^0-9]'
>>  
>> -IMGOPTS="compat=1.1"
>>  IMG_SIZE=128K
>>  
>>  case "$QEMU_DEFAULT_MACHINE" in
>> diff --git a/tests/qemu-iotests/098 b/tests/qemu-iotests/098
>> index 1c1d1c468f..2d68dc7d6c 100755
>> --- a/tests/qemu-iotests/098
>> +++ b/tests/qemu-iotests/098
>> @@ -40,8 +40,7 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
>>  
>>  _supported_fmt qcow2
>>  _supported_proto file
>> -
>> -IMGOPTS="compat=1.1"
>> +_unsupported_imgopts 'compat=0.10'
> Any idea why? I am not familiar with qcow2 well enought to
> know but this misses a comment with justification.

Because the special bdrv_make_empty() version we want to test only works
with qcow2 v3 images.

>>  
>>  for event in l1_update empty_image_prepare reftable_update refblock_alloc; do
>>  
> 
> 
> Best regards,
> 	Maxim Levitsky
> 

Thanks for reviewing!

Max
Maxim Levitsky Sept. 30, 2019, 2:47 p.m. UTC | #3
On Mon, 2019-09-30 at 14:59 +0200, Max Reitz wrote:
> On 29.09.19 18:31, Maxim Levitsky wrote:
> > On Fri, 2019-09-27 at 11:42 +0200, Max Reitz wrote:
> > > Some tests require compat=1.1 and thus set IMGOPTS='compat=1.1'
> > > globally.  That is not how it should be done; instead, they should
> > > simply set _unsupported_imgopts to compat=0.10 (compat=1.1 is the
> > > default anyway).
> > > 
> > > This makes the tests heed user-specified $IMGOPTS.  Some do not work
> > > with all image options, though, so we need to disable them accordingly.
> > > 
> > > Signed-off-by: Max Reitz <mreitz@redhat.com>
> > > ---
> > >  tests/qemu-iotests/036 | 3 +--
> > >  tests/qemu-iotests/060 | 4 ++--
> > >  tests/qemu-iotests/062 | 3 ++-
> > >  tests/qemu-iotests/066 | 3 ++-
> > >  tests/qemu-iotests/068 | 3 ++-
> > >  tests/qemu-iotests/098 | 3 +--
> > >  6 files changed, 10 insertions(+), 9 deletions(-)
> > > 
> > > diff --git a/tests/qemu-iotests/036 b/tests/qemu-iotests/036
> > > index 69d0f9f903..57dda23b02 100755
> > > --- a/tests/qemu-iotests/036
> > > +++ b/tests/qemu-iotests/036
> > > @@ -43,9 +43,8 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
> > >  # This tests qcow2-specific low-level functionality
> > >  _supported_fmt qcow2
> > >  _supported_proto file
> > > -
> > >  # Only qcow2v3 and later supports feature bits
> > > -IMGOPTS="compat=1.1"
> > > +_unsupported_imgopts 'compat=0.10'
> > >  
> > >  echo
> > >  echo === Image with unknown incompatible feature bit ===
> > > diff --git a/tests/qemu-iotests/060 b/tests/qemu-iotests/060
> > > index b91d8321bb..9c2ef42522 100755
> > > --- a/tests/qemu-iotests/060
> > > +++ b/tests/qemu-iotests/060
> > > @@ -48,6 +48,8 @@ _filter_io_error()
> > >  _supported_fmt qcow2
> > >  _supported_proto file
> > >  _supported_os Linux
> > > +# These tests only work for compat=1.1 images with refcount_bits=16
> > > +_unsupported_imgopts 'compat=0.10' 'refcount_bits=\([^1]\|.\([^6]\|$\)\)'
> > >  
> > >  rt_offset=65536  # 0x10000 (XXX: just an assumption)
> > >  rb_offset=131072 # 0x20000 (XXX: just an assumption)
> > > @@ -55,8 +57,6 @@ l1_offset=196608 # 0x30000 (XXX: just an assumption)
> > >  l2_offset=262144 # 0x40000 (XXX: just an assumption)
> > >  l2_offset_after_snapshot=524288 # 0x80000 (XXX: just an assumption)
> > >  
> > > -IMGOPTS="compat=1.1"
> > > -
> > >  OPEN_RW="open -o overlap-check=all $TEST_IMG"
> > >  # Overlap checks are done before write operations only, therefore opening an
> > >  # image read-only makes the overlap-check option irrelevant
> > > diff --git a/tests/qemu-iotests/062 b/tests/qemu-iotests/062
> > > index d5f818fcce..ac0d2a9a3b 100755
> > > --- a/tests/qemu-iotests/062
> > > +++ b/tests/qemu-iotests/062
> > > @@ -40,8 +40,9 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
> > >  # This tests qocw2-specific low-level functionality
> > >  _supported_fmt qcow2
> > >  _supported_proto generic
> > > +# We need zero clusters and snapshots
> > > +_unsupported_imgopts 'compat=0.10' 'refcount_bits=1[^0-9]'
> > >  
> > > -IMGOPTS="compat=1.1"
> > >  IMG_SIZE=64M
> > >  
> > >  echo
> > > diff --git a/tests/qemu-iotests/066 b/tests/qemu-iotests/066
> > > index 28f8c98412..9a15ba8027 100755
> > > --- a/tests/qemu-iotests/066
> > > +++ b/tests/qemu-iotests/066
> > > @@ -39,9 +39,10 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
> > >  # This tests qocw2-specific low-level functionality
> > >  _supported_fmt qcow2
> > >  _supported_proto generic
> > > +# Weneed zero clusters and snapshots
> > 
> > Typo
> 
> Indeed!
> 
> > > +_unsupported_imgopts 'compat=0.10' 'refcount_bits=1[^0-9]'
> > >  
> > >  # Intentionally create an unaligned image
> > > -IMGOPTS="compat=1.1"
> > >  IMG_SIZE=$((64 * 1024 * 1024 + 512))
> > >  
> > >  echo
> > > diff --git a/tests/qemu-iotests/068 b/tests/qemu-iotests/068
> > > index 22f5ca3ba6..65650fca9a 100755
> > > --- a/tests/qemu-iotests/068
> > > +++ b/tests/qemu-iotests/068
> > > @@ -39,8 +39,9 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
> > >  # This tests qocw2-specific low-level functionality
> > >  _supported_fmt qcow2
> > >  _supported_proto generic
> > > +# Internal snapshots are (currently) impossible with refcount_bits=1
> > 
> > Why currently? 1 bit will only allow to mark a cluser as used/unused which
> > is not enough for any snapshots?
> 
> It is, because in theory you can just copy the clusters at the time of
> snapshotting.  We’ll never implement it, but, well...
Fair enough, I didn't even thought of that. I fully agree that
implementing this is silly.

> 
> > > +_unsupported_imgopts 'compat=0.10' 'refcount_bits=1[^0-9]'
> > >  
> > > -IMGOPTS="compat=1.1"
> > >  IMG_SIZE=128K
> > >  
> > >  case "$QEMU_DEFAULT_MACHINE" in
> > > diff --git a/tests/qemu-iotests/098 b/tests/qemu-iotests/098
> > > index 1c1d1c468f..2d68dc7d6c 100755
> > > --- a/tests/qemu-iotests/098
> > > +++ b/tests/qemu-iotests/098
> > > @@ -40,8 +40,7 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
> > >  
> > >  _supported_fmt qcow2
> > >  _supported_proto file
> > > -
> > > -IMGOPTS="compat=1.1"
> > > +_unsupported_imgopts 'compat=0.10'
> > 
> > Any idea why? I am not familiar with qcow2 well enought to
> > know but this misses a comment with justification.
> 
> Because the special bdrv_make_empty() version we want to test only works
> with qcow2 v3 images.
Just to understand this, we have

compat=0.10, also known as v2, which is the classical qcow2 (and v1 is basically qcow)
and then we have compat=1.1 which is also known as v3, and once upon a time was supposed
to be called qcow3, but at the end remained qcow2.



> 
> > >  
> > >  for event in l1_update empty_image_prepare reftable_update refblock_alloc; do
> > >  
> > 
> > 
> > Best regards,
> > 	Maxim Levitsky
> > 
> 
> Thanks for reviewing!
Thanks to you too!

I will focus more on reviewing in next few months,
since I really don't do this enough.

Best regards,
	Maxim Levitsky


> 
> Max
>
Max Reitz Sept. 30, 2019, 2:59 p.m. UTC | #4
On 30.09.19 16:47, Maxim Levitsky wrote:
> On Mon, 2019-09-30 at 14:59 +0200, Max Reitz wrote:
>> On 29.09.19 18:31, Maxim Levitsky wrote:
>>> On Fri, 2019-09-27 at 11:42 +0200, Max Reitz wrote:
>>>> Some tests require compat=1.1 and thus set IMGOPTS='compat=1.1'
>>>> globally.  That is not how it should be done; instead, they should
>>>> simply set _unsupported_imgopts to compat=0.10 (compat=1.1 is the
>>>> default anyway).
>>>>
>>>> This makes the tests heed user-specified $IMGOPTS.  Some do not work
>>>> with all image options, though, so we need to disable them accordingly.
>>>>
>>>> Signed-off-by: Max Reitz <mreitz@redhat.com>
>>>> ---
>>>>  tests/qemu-iotests/036 | 3 +--
>>>>  tests/qemu-iotests/060 | 4 ++--
>>>>  tests/qemu-iotests/062 | 3 ++-
>>>>  tests/qemu-iotests/066 | 3 ++-
>>>>  tests/qemu-iotests/068 | 3 ++-
>>>>  tests/qemu-iotests/098 | 3 +--
>>>>  6 files changed, 10 insertions(+), 9 deletions(-)

[...]

>>
>>>> +_unsupported_imgopts 'compat=0.10' 'refcount_bits=1[^0-9]'
>>>>  
>>>> -IMGOPTS="compat=1.1"
>>>>  IMG_SIZE=128K
>>>>  
>>>>  case "$QEMU_DEFAULT_MACHINE" in
>>>> diff --git a/tests/qemu-iotests/098 b/tests/qemu-iotests/098
>>>> index 1c1d1c468f..2d68dc7d6c 100755
>>>> --- a/tests/qemu-iotests/098
>>>> +++ b/tests/qemu-iotests/098
>>>> @@ -40,8 +40,7 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
>>>>  
>>>>  _supported_fmt qcow2
>>>>  _supported_proto file
>>>> -
>>>> -IMGOPTS="compat=1.1"
>>>> +_unsupported_imgopts 'compat=0.10'
>>>
>>> Any idea why? I am not familiar with qcow2 well enought to
>>> know but this misses a comment with justification.
>>
>> Because the special bdrv_make_empty() version we want to test only works
>> with qcow2 v3 images.
> Just to understand this, we have
> 
> compat=0.10, also known as v2, which is the classical qcow2 (and v1 is basically qcow)
> and then we have compat=1.1 which is also known as v3, and once upon a time was supposed
> to be called qcow3, but at the end remained qcow2.

Yep, that’s correct.  If you want to, you can still call it qcow3.  I
wanted to do that at some point, but it turned out that nobody else does it.

Max
diff mbox series

Patch

diff --git a/tests/qemu-iotests/036 b/tests/qemu-iotests/036
index 69d0f9f903..57dda23b02 100755
--- a/tests/qemu-iotests/036
+++ b/tests/qemu-iotests/036
@@ -43,9 +43,8 @@  trap "_cleanup; exit \$status" 0 1 2 3 15
 # This tests qcow2-specific low-level functionality
 _supported_fmt qcow2
 _supported_proto file
-
 # Only qcow2v3 and later supports feature bits
-IMGOPTS="compat=1.1"
+_unsupported_imgopts 'compat=0.10'
 
 echo
 echo === Image with unknown incompatible feature bit ===
diff --git a/tests/qemu-iotests/060 b/tests/qemu-iotests/060
index b91d8321bb..9c2ef42522 100755
--- a/tests/qemu-iotests/060
+++ b/tests/qemu-iotests/060
@@ -48,6 +48,8 @@  _filter_io_error()
 _supported_fmt qcow2
 _supported_proto file
 _supported_os Linux
+# These tests only work for compat=1.1 images with refcount_bits=16
+_unsupported_imgopts 'compat=0.10' 'refcount_bits=\([^1]\|.\([^6]\|$\)\)'
 
 rt_offset=65536  # 0x10000 (XXX: just an assumption)
 rb_offset=131072 # 0x20000 (XXX: just an assumption)
@@ -55,8 +57,6 @@  l1_offset=196608 # 0x30000 (XXX: just an assumption)
 l2_offset=262144 # 0x40000 (XXX: just an assumption)
 l2_offset_after_snapshot=524288 # 0x80000 (XXX: just an assumption)
 
-IMGOPTS="compat=1.1"
-
 OPEN_RW="open -o overlap-check=all $TEST_IMG"
 # Overlap checks are done before write operations only, therefore opening an
 # image read-only makes the overlap-check option irrelevant
diff --git a/tests/qemu-iotests/062 b/tests/qemu-iotests/062
index d5f818fcce..ac0d2a9a3b 100755
--- a/tests/qemu-iotests/062
+++ b/tests/qemu-iotests/062
@@ -40,8 +40,9 @@  trap "_cleanup; exit \$status" 0 1 2 3 15
 # This tests qocw2-specific low-level functionality
 _supported_fmt qcow2
 _supported_proto generic
+# We need zero clusters and snapshots
+_unsupported_imgopts 'compat=0.10' 'refcount_bits=1[^0-9]'
 
-IMGOPTS="compat=1.1"
 IMG_SIZE=64M
 
 echo
diff --git a/tests/qemu-iotests/066 b/tests/qemu-iotests/066
index 28f8c98412..9a15ba8027 100755
--- a/tests/qemu-iotests/066
+++ b/tests/qemu-iotests/066
@@ -39,9 +39,10 @@  trap "_cleanup; exit \$status" 0 1 2 3 15
 # This tests qocw2-specific low-level functionality
 _supported_fmt qcow2
 _supported_proto generic
+# Weneed zero clusters and snapshots
+_unsupported_imgopts 'compat=0.10' 'refcount_bits=1[^0-9]'
 
 # Intentionally create an unaligned image
-IMGOPTS="compat=1.1"
 IMG_SIZE=$((64 * 1024 * 1024 + 512))
 
 echo
diff --git a/tests/qemu-iotests/068 b/tests/qemu-iotests/068
index 22f5ca3ba6..65650fca9a 100755
--- a/tests/qemu-iotests/068
+++ b/tests/qemu-iotests/068
@@ -39,8 +39,9 @@  trap "_cleanup; exit \$status" 0 1 2 3 15
 # This tests qocw2-specific low-level functionality
 _supported_fmt qcow2
 _supported_proto generic
+# Internal snapshots are (currently) impossible with refcount_bits=1
+_unsupported_imgopts 'compat=0.10' 'refcount_bits=1[^0-9]'
 
-IMGOPTS="compat=1.1"
 IMG_SIZE=128K
 
 case "$QEMU_DEFAULT_MACHINE" in
diff --git a/tests/qemu-iotests/098 b/tests/qemu-iotests/098
index 1c1d1c468f..2d68dc7d6c 100755
--- a/tests/qemu-iotests/098
+++ b/tests/qemu-iotests/098
@@ -40,8 +40,7 @@  trap "_cleanup; exit \$status" 0 1 2 3 15
 
 _supported_fmt qcow2
 _supported_proto file
-
-IMGOPTS="compat=1.1"
+_unsupported_imgopts 'compat=0.10'
 
 for event in l1_update empty_image_prepare reftable_update refblock_alloc; do