# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2026 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENSE.TXT
"""Kernel-side LVP/LVE operations via pylve bindings."""
from lve_utils.pylve_wrapper import PyLve
from .exceptions import LvdError
try:
import pylve
except ImportError:
pylve = None
def get_pylve():
"""Initialize and return a PyLve instance."""
if pylve is None:
raise LvdError("pylve module not available")
py = PyLve(pylve)
py.initialize()
if not py.domains_supported():
raise LvdError("kernel does not support per-domain limits "
"(requires lve_lvp_create2)")
return py
def settings_from_limits(py, limits):
"""Create liblve_settings from a limits dict."""
settings = py.liblve_settings()
if 'cpu' in limits:
settings.ls_cpu = int(limits['cpu'])
if 'pmem' in limits:
settings.ls_memory_phy = int(limits['pmem'])
if 'io' in limits:
settings.ls_io = int(limits['io'])
if 'nproc' in limits:
settings.ls_nproc = int(limits['nproc'])
if 'iops' in limits:
settings.ls_iops = int(limits['iops'])
return settings
def settings_to_dict(settings):
"""Convert liblve_settings to a dict of limit fields."""
return {
'cpu': settings.ls_cpu,
'pmem': settings.ls_memory_phy,
'io': settings.ls_io,
'nproc': settings.ls_nproc,
'iops': settings.ls_iops,
}
def lvp_setup_direct(domain_id, settings):
"""Call pylve.lve_lvp_setup directly, bypassing the lveapi wrapper.
The lveapi wrapper iterates /proc/lve/resellers/ which doesn't exist
for nested domain LVPs (they are leaf containers)."""
rc = pylve.lve_lvp_setup(domain_id, settings)
return rc
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