[PATCH v5 02/19] iotests.py: implement unsupported_imgopts

[Vladimir Sementsov-Ogievskiy]

We are going to support some addition IMGOPTS in python iotests like
in bash iotests. Similarly to bash iotests, we want a way to skip some
tests which can't work with specific IMGOPTS.

Globally for python iotests we will not support things like
'data_file=$TEST_IMG.ext_data_file' in IMGOPTS, so, forbid this
globally in iotests.py.

Suggested-by: Hanna Reitz <hreitz@redhat.com>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
---
 tests/qemu-iotests/iotests.py | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index 9b374dad3d..35d92715cc 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -1215,6 +1215,17 @@ def _verify_virtio_scsi_pci_or_ccw() -> None:
         notrun('Missing virtio-scsi-pci or virtio-scsi-ccw in QEMU binary')
 
 
+def _verify_imgopts(unsupported: Sequence[str] = ()) -> None:
+    imgopts = os.environ.get('IMGOPTS')
+    # One of usage examples for IMGOPTS is "data_file=$TEST_IMG.ext_data_file"
+    # but it supported only for bash tests. We don't have a concept of global
+    # TEST_IMG in iotests.py, not saying about somehow parsing $variables.
+    # So, for simplicity let's just not support any IMGOPTS with '$' inside.
+    unsup = list(unsupported) + ['$']
+    if imgopts and any(x in imgopts for x in unsup):
+        notrun(f'not suitable for this imgopts: {imgopts}')
+
+
 def supports_quorum():
     return 'quorum' in qemu_img_pipe('--help')
 
@@ -1391,7 +1402,8 @@ def execute_setup_common(supported_fmts: Sequence[str] = 
(),
                          unsupported_fmts: Sequence[str] = (),
                          supported_protocols: Sequence[str] = (),
                          unsupported_protocols: Sequence[str] = (),
-                         required_fmts: Sequence[str] = ()) -> bool:
+                         required_fmts: Sequence[str] = (),
+                         unsupported_imgopts: Sequence[str] = ()) -> bool:
     """
     Perform necessary setup for either script-style or unittest-style tests.
 
@@ -1411,6 +1423,7 @@ def execute_setup_common(supported_fmts: Sequence[str] = 
(),
     _verify_aio_mode(supported_aio_modes)
     _verify_formats(required_fmts)
     _verify_virtio_blk()
+    _verify_imgopts(unsupported_imgopts)
 
     return debug
 
-- 
2.31.1