[RFC 7/9] selftests: block_seek_hole: add dm-linear test

Stefan Hajnoczi
2024-03-28T20:40:31Z

The dm-linear linear target passes through SEEK_HOLE/SEEK_DATA. Extend
the test case to check that the same holes/data are reported as for the
underlying file.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
tools/testing/selftests/block_seek_hole/test.py | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/block_seek_hole/test.py b/tools/testing/selftests/block_seek_hole/test.py
index 4f7c2d01ab3d3..6360b72aee338 100755
--- a/tools/testing/selftests/block_seek_hole/test.py
+++ b/tools/testing/selftests/block_seek_hole/test.py
@@ -45,6 +45,20 @@ def loop_device(file_path):
finally:
run(['losetup', '-d', loop_path])

+@contextmanager
+def dm_linear(file_path):
+ file_size = os.path.getsize(file_path)
+
+ with loop_device(file_path) as loop_path:
+ dm_name = f'test-{os.getpid()}'
+ run(['dmsetup', 'create', dm_name, '--table',
+ f'0 {file_size // 512} linear {loop_path} 0'])
+
+ try:
+ yield f'/dev/mapper/{dm_name}'
+ finally:
+ run(['dmsetup', 'remove', dm_name])
+
def test(layout, dev_context_manager):
with test_file(layout) as file_path, dev_context_manager(file_path) as dev_path:
cmd = run(['./map_holes.py', file_path])
@@ -99,5 +113,5 @@ if __name__ == '__main__':
holes_at_beginning_and_end,
no_holes,
empty_file]
- dev_context_managers = [loop_device]
+ dev_context_managers = [loop_device, dm_linear]
test_all(layouts, dev_context_managers)
--
2.44.0