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Direktori : /lib/python2.7/site-packages/tuned/plugins/ |
Current File : //lib/python2.7/site-packages/tuned/plugins/plugin_sysfs.py |
from . import base import glob import re import os.path from .decorators import * import tuned.logs from subprocess import * from tuned.utils.commands import commands log = tuned.logs.get() class SysfsPlugin(base.Plugin): """ Plugin for applying custom sysfs options, using specific plugins is preferred. """ # TODO: resolve possible conflicts with sysctl settings from other plugins def __init__(self, *args, **kwargs): super(SysfsPlugin, self).__init__(*args, **kwargs) self._has_dynamic_options = True self._cmd = commands() def _instance_init(self, instance): instance._has_dynamic_tuning = False instance._has_static_tuning = True instance._sysfs = dict([(os.path.normpath(key_value[0]), key_value[1]) for key_value in list(instance.options.items())]) instance._sysfs_original = {} def _instance_cleanup(self, instance): pass def _instance_apply_static(self, instance): for key, value in list(instance._sysfs.items()): v = self._variables.expand(value) for f in glob.iglob(key): if self._check_sysfs(f): instance._sysfs_original[f] = self._read_sysfs(f) self._write_sysfs(f, v) else: log.error("rejecting write to '%s' (not inside /sys)" % f) def _instance_verify_static(self, instance, ignore_missing, devices): ret = True for key, value in list(instance._sysfs.items()): v = self._variables.expand(value) for f in glob.iglob(key): if self._check_sysfs(f): curr_val = self._read_sysfs(f) if self._verify_value(f, v, curr_val, ignore_missing) == False: ret = False return ret def _instance_unapply_static(self, instance, full_rollback = False): for key, value in list(instance._sysfs_original.items()): self._write_sysfs(key, value) def _check_sysfs(self, sysfs_file): return re.match(r"^/sys/.*", sysfs_file) def _read_sysfs(self, sysfs_file): data = self._cmd.read_file(sysfs_file).strip() if len(data) > 0: return self._cmd.get_active_option(data, False) else: return None def _write_sysfs(self, sysfs_file, value): return self._cmd.write_to_file(sysfs_file, value)