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import os
import errno
import cephfs
from ..exception import VolumeException
from distutils.util import strtobool
_pin_value = {
"export": lambda x: int(x),
"distributed": lambda x: int(strtobool(x)),
"random": lambda x: float(x),
}
_pin_xattr = {
"export": "ceph.dir.pin",
"distributed": "ceph.dir.pin.distributed",
"random": "ceph.dir.pin.random",
}
def pin(fs, path, pin_type, pin_setting):
"""
Set a pin on a directory.
"""
assert pin_type in _pin_xattr
try:
pin_setting = _pin_value[pin_type](pin_setting)
except ValueError as e:
raise VolumeException(-errno.EINVAL, f"pin value wrong type: {pin_setting}")
try:
fs.setxattr(path, _pin_xattr[pin_type], str(pin_setting).encode('utf-8'), 0)
except cephfs.Error as e:
raise VolumeException(-e.args[0], e.args[1])
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