def exists(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 = DmLinearTable(self.group_name,
root_helper=self.root_helper)
assert hdd_group.existed, "Group %s dose NOT exist..." % self.group_name
return self._exists(hdd_group, disk)
def rm_disk(self, disk_path):
if os.path.islink(disk_path):
disk_path = os.path.realpath(disk_path)
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
disk = self.hdd_group.find_disk(disk_path)
dm = Dmsetup(root_helper=self.root_helper)
cached_name = self._cached_disk_name(disk.dev)
dm.remove_table(cached_name)
self.hdd_group.remove_disk(disk)
def delete_group(self):
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
dm = Dmsetup(root_helper=self.root_helper)
# TODO: check for wether busy
for disk in self.hdd_group.disks:
if disk.mapper != 'error':
cached_name = self._cached_disk_name(disk.dev)
dm.remove_table(cached_name)
self._destroy_cache()
time.sleep(0.1)
dm.remove_table(self._ssd_name)
dm.remove_table(self.group_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
