def undo(self):
assert(len(self.components) > 0)
name = getSnapshotOriginDevName(self.lvolid)
path = getDmDevPath(name)
if os.path.exists(path):
dmsetup_remove(name)
self.path = None
def do(self):
assert(len(self.components) > 0)
name = getSnapshotOriginDevName(self.lvolid)
path = getDmDevPath(name)
if not os.path.exists(path):
c = self.components[0]
command = "echo 0 %s snapshot-origin %s | dmsetup create %s" % \
(gtos(self.capacity), c.path, name)
execute_retry_not_path_exist(command, path, DMSETUP_RETRY_TIMES)
self.path = path
def dm_resume(lvolid):
name = getSnapshotOriginDevName(lvolid)
path = getDmDevPath(name)
if os.path.exists(path):
command = "dmsetup resume %s" % name
executecommand(command)
