def undo(self):
assert len(self.components) == 1
name = getDextDevName(self.dext_ssvrid, self.lvolid)
path = getDmDevPath(name)
if os.path.exists(path):
dmsetup_remove(name)
self.path = None
def do(self):
assert len(self.components) == 1
c = self.components[0]
assert c.iscsi_ref != None
name = getDextDevName(self.dext_ssvrid, self.lvolid)
path = getDmDevPath(name)
if not os.path.exists(path):
command = "echo 0 %s linear %s %s | dmsetup create %s" % (
vbtos(self.capacity),
c.path,
vbtos(self.dext_offset),
name,
)
execute_retry_not_path_exist(command, path, DMSETUP_RETRY_TIMES)
self.path = path
os.close(c.iscsi_ref)
c.iscsi_ref = None