class Table(object):
def __init__(self, name, method, root_helper=''):
self.root_helper = root_helper
self.name = name
self.method = method
self.path = ''
self.dm = Dmsetup(root_helper=root_helper)
self.block = Blockdev(root_helper=root_helper)
if self.dm.is_exist(self.name):
self.existed = True
else:
self.existed = False
def __str__(self):
return NotImplementedError()
def _parse_table(self):
return NotImplementedError()
def create_table(self):
if self.existed:
raise Exception("%s has been existed!" % self.name)
else:
self.path = self.dm.create_table(self.name, str(self))
self.existed = True
def remove_table(self):
if not self.existed:
raise Exception("%s does NOT exist!" % self.name)
else:
self.dm.remove_table(self.name)
def reload_table(self):
self.dm.reload_table(self.name, str(self))
def add_disk(self, disk_path):
if os.path.islink(disk_path):
disk_path = os.path.realpath(disk_path)
disk = Disk.from_path(disk_path, root_helper=self.root_helper)
hdd_group = FcgLinearTable(self.group_name, root_helper=self.root_helper)
assert hdd_group.existed, "Group %s dose NOT exist..." % self.group_name
if not hdd_group.exists(disk):
hdd_group.insert_disk(disk)
dm = Dmsetup(root_helper=self.root_helper)
cached_disk_name = self._cached_disk_name(disk.dev)
if not dm.is_exist(cached_disk_name):
cache_dev = dm.mapdev_prefix + self._cache_name
cached_table = '0 %d linear %s %d' % (disk.size, cache_dev, disk.start)
dm.create_table(cached_disk_name, cached_table)
return dm.mapdev_prefix + cached_disk_name
def add_disk(self, disk_path):
if os.path.islink(disk_path):
disk_path = os.path.realpath(disk_path)
disk = Disk.from_path(disk_path, root_helper=self.root_helper)
if not self.hdd_group:
self.hdd_group = DmLinearTable(self.group_name,
root_helper=self.root_helper)
assert self.hdd_group.existed, "Group %s dose NOT exist..." % self.group_name
if not self.hdd_group.exists(disk):
self.hdd_group.append_disk(disk)
dm = Dmsetup(root_helper=self.root_helper)
cached_disk_name = self._cached_disk_name(disk.dev)
if not dm.is_exist(cached_disk_name):
cache_dev = dm.mapdev_prefix + self._cache_name
cached_table = '0 %d linear %s %d' % (disk.size, cache_dev,
disk.start)
dm.create_table(cached_disk_name, cached_table)
return dm.mapdev_prefix + cached_disk_name
def _exists(self, fcg_table, disk):
dm = Dmsetup(root_helper=self.root_helper)
cached_disk_name = self._cached_disk_name(disk.dev)
return fcg_table.exists(disk) and dm.is_exist(cached_disk_name)
def _exists(self, fcg_table, disk):
dm = Dmsetup(root_helper=self.root_helper)
cached_disk_name = self._cached_disk_name(disk.dev)
return fcg_table.exists(disk) and dm.is_exist(cached_disk_name)
