libbtrfsutil: add btrfs_util_create_subvolume()

Doing the ioctl() directly isn't too bad, but passing in a full path is
more convenient than opening the parent and passing the path component.

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/libbtrfsutil/python/tests/test_qgroup.py b/libbtrfsutil/python/tests/test_qgroup.py
index a590464b..19e6b05a 100644
--- a/libbtrfsutil/python/tests/test_qgroup.py
+++ b/libbtrfsutil/python/tests/test_qgroup.py
@@ -19,6 +19,17 @@ import os
 import unittest
 
 import btrfsutil
+from tests import BtrfsTestCase
+
+
+class TestQgroup(BtrfsTestCase):
+    def test_subvolume_inherit(self):
+        subvol = os.path.join(self.mountpoint, 'subvol')
+
+        inherit = btrfsutil.QgroupInherit()
+        inherit.add_group(5)
+
+        btrfsutil.create_subvolume(subvol, qgroup_inherit=inherit)
 
 
 class TestQgroupInherit(unittest.TestCase):