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Diffstat (limited to '')
| -rw-r--r-- | qa/tasks/cephfs/test_backtrace.py | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/qa/tasks/cephfs/test_backtrace.py b/qa/tasks/cephfs/test_backtrace.py new file mode 100644 index 00000000..af246a1e --- /dev/null +++ b/qa/tasks/cephfs/test_backtrace.py @@ -0,0 +1,78 @@ + +from tasks.cephfs.cephfs_test_case import CephFSTestCase + + +class TestBacktrace(CephFSTestCase): + def test_backtrace(self): + """ + That the 'parent' and 'layout' xattrs on the head objects of files + are updated correctly. + """ + + old_data_pool_name = self.fs.get_data_pool_name() + old_pool_id = self.fs.get_data_pool_id() + + # Create a file for subsequent checks + self.mount_a.run_shell(["mkdir", "parent_a"]) + self.mount_a.run_shell(["touch", "parent_a/alpha"]) + file_ino = self.mount_a.path_to_ino("parent_a/alpha") + + # That backtrace and layout are written after initial flush + self.fs.mds_asok(["flush", "journal"]) + backtrace = self.fs.read_backtrace(file_ino) + self.assertEqual(['alpha', 'parent_a'], [a['dname'] for a in backtrace['ancestors']]) + layout = self.fs.read_layout(file_ino) + self.assertDictEqual(layout, { + "stripe_unit": 4194304, + "stripe_count": 1, + "object_size": 4194304, + "pool_id": old_pool_id, + "pool_ns": "", + }) + self.assertEqual(backtrace['pool'], old_pool_id) + + # That backtrace is written after parentage changes + self.mount_a.run_shell(["mkdir", "parent_b"]) + self.mount_a.run_shell(["mv", "parent_a/alpha", "parent_b/alpha"]) + + self.fs.mds_asok(["flush", "journal"]) + backtrace = self.fs.read_backtrace(file_ino) + self.assertEqual(['alpha', 'parent_b'], [a['dname'] for a in backtrace['ancestors']]) + + # Create a new data pool + new_pool_name = "data_new" + new_pool_id = self.fs.add_data_pool(new_pool_name) + + # That an object which has switched pools gets its backtrace updated + self.mount_a.setfattr("./parent_b/alpha", + "ceph.file.layout.pool", new_pool_name) + self.fs.mds_asok(["flush", "journal"]) + backtrace_old_pool = self.fs.read_backtrace(file_ino, pool=old_data_pool_name) + self.assertEqual(backtrace_old_pool['pool'], new_pool_id) + backtrace_new_pool = self.fs.read_backtrace(file_ino, pool=new_pool_name) + self.assertEqual(backtrace_new_pool['pool'], new_pool_id) + new_pool_layout = self.fs.read_layout(file_ino, pool=new_pool_name) + self.assertEqual(new_pool_layout['pool_id'], new_pool_id) + self.assertEqual(new_pool_layout['pool_ns'], '') + + # That subsequent linkage changes are only written to new pool backtrace + self.mount_a.run_shell(["mkdir", "parent_c"]) + self.mount_a.run_shell(["mv", "parent_b/alpha", "parent_c/alpha"]) + self.fs.mds_asok(["flush", "journal"]) + backtrace_old_pool = self.fs.read_backtrace(file_ino, pool=old_data_pool_name) + self.assertEqual(['alpha', 'parent_b'], [a['dname'] for a in backtrace_old_pool['ancestors']]) + backtrace_new_pool = self.fs.read_backtrace(file_ino, pool=new_pool_name) + self.assertEqual(['alpha', 'parent_c'], [a['dname'] for a in backtrace_new_pool['ancestors']]) + + # That layout is written to new pool after change to other field in layout + self.mount_a.setfattr("./parent_c/alpha", + "ceph.file.layout.object_size", "8388608") + + self.fs.mds_asok(["flush", "journal"]) + new_pool_layout = self.fs.read_layout(file_ino, pool=new_pool_name) + self.assertEqual(new_pool_layout['object_size'], 8388608) + + # ...but not to the old pool: the old pool's backtrace points to the new pool, and that's enough, + # we don't update the layout in all the old pools whenever it changes + old_pool_layout = self.fs.read_layout(file_ino, pool=old_data_pool_name) + self.assertEqual(old_pool_layout['object_size'], 4194304) |