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clquota_lib.py
# -*- coding: utf-8 -*- # clquota.py - module for interfacing with cl-quota utility for get/set user's quotas # # Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2019 All Rights Reserved # # Licensed under CLOUD LINUX LICENSE AGREEMENT # http://cloudlinux.com/docs/LICENSE.TXT import json from typing import Dict, Optional, Tuple from clcommon.clexception import FormattedException from clcommon.utils import ExternalProgramFailed, run_command from cllimits.lib import exec_utility from cllimits.lib.utils import is_quota_active, is_quota_supported class ClQuotaException(FormattedException): pass class UnexpectedClQuotaError(ClQuotaException): """ Raised when we get output from cl-quota that cannot be parsed properly. """ def __init__(self, raw_response=None): broken_exc_message = {'message': "Unexpected response got from %(util)s. " "Raw response from cl-quota: '%(raw_response)s'." "Please, contact CloudLinux support for help in resolving this issue.", 'context': {'util': 'Quota', 'raw_response': raw_response}} super().__init__(broken_exc_message) class QuotaDisabledException(ClQuotaException): """ Raised when quotas are disabled in system globally. """ def __init__(self): disabled_exc_message = {'message': "%(util)s is disabled", 'context': {'util': 'Quota'}} super().__init__(disabled_exc_message) class ClQuotaLib: _CL_QUOTA_PATH = '/usr/bin/cl-quota' _REPQUOTA_PATH = '/usr/sbin/repquota' def __init__(self): # inodes limits data # uid --> (soft_limit, hard_limit) self._inode_user_limits: Optional[Dict[str, Tuple[str, str]]] = None self._inode_package_dict: Optional[Dict[str, Tuple[str, str]]] = None # Check if quota is supported self._is_clquota_present = None # Check if quota is activated self._is_clquota_activated = None def is_clquota_present(self): """ Get quota presence flag :return: True/False - quotas present/not present """ if self._is_clquota_present is None: self._is_clquota_present = is_quota_supported(self._CL_QUOTA_PATH, self._REPQUOTA_PATH) return self._is_clquota_present def is_clquota_activated(self): """ Get quota activated flag :return: True/False - quotas activeted/not activeted """ if self._is_clquota_activated is None: self._is_clquota_activated = is_quota_active(self._CL_QUOTA_PATH, self._REPQUOTA_PATH) return self._is_clquota_activated def get_inodes_limits_by_uid(self, user_id): """ Retrive inodes limits by uid :param user_id: Supplied uid :return: cortege (soft_limit, hard_limit). (None, None) if governor not present or error """ # Load inodes data if need self._load_users_info() uid = str(user_id) if uid in self._inode_user_limits: return self._inode_user_limits[uid] return self._inode_user_limits['0'] def set_user_inodes_limits(self, uid, limits, force=False): """ Set inodes limits for user uid :param: int uid: user id :param: list limits: new inodes limits :param: bool force: save limits if even they are equal to defaults :return: None """ self._load_users_info() if not isinstance(uid, int) or uid < 0: exc_message = {'message': "User id '%(uid)s' isn't a positive integer", 'context': {'uid': uid}} raise ClQuotaException(exc_message) if limits == "unlimited": limits = ["unlimited"] * 2 elif limits == "default": limits = ["default"] * 2 else: if type(limits) in [tuple, list]: pass elif len(limits.split(',')) == 2: limits = limits.split(',') else: exc_message = {'message': "Limits %(limits)s aren't acceptable.", 'context': {'limits': limits}} raise ClQuotaException(exc_message) for limit in limits: try: if limit != "default": limit = int(limit) if limit < 0: raise ValueError() except ValueError as e: exc_message = {'message': "Limit value '%(limit)s' isn't a positive integer or string %(default)s", 'context': {'limit': limit, 'default': 'default'}} raise ClQuotaException(exc_message) from e cmd = [self._CL_QUOTA_PATH, f'--user-id={uid}', f'--soft-limit={limits[0]}', f'--hard-limit={limits[1]}'] if force: cmd.append("--force") try: run_command(cmd) except ExternalProgramFailed as e: raise ClQuotaException(str(e)) from e def set_user_inodes_limits_unlimited(self, uid): """ Set unlimited inodes limits for user uid :param: int uid: user id :return: None """ self.set_user_inodes_limits(uid, "unlimited") def reset_user_inodes_limits(self, uid): """ Set default inodes limits for user uid :param: int uid: user id :return: None """ self.set_user_inodes_limits(uid, "default") def _load_users_info(self): """ Loads users info from cl-quota :return: None """ # Exit if cl-quota data already loaded if self._inode_user_limits is not None: return # Exit if cl-quota not present or cl-quota error if not self.is_clquota_present() or not self.is_clquota_activated(): raise QuotaDisabledException() try: data = self._get_quotas(['--json']) except ClQuotaException: self._inode_user_limits = None raise self._inode_user_limits = {} for uid, limits in data.items(): self._inode_user_limits[uid] = (int(limits[1][1]), int(limits[2][1])) if '0' not in self._inode_user_limits: self._inode_user_limits = None exc_message = {'message': "There is no %(what)s found in %(where)s", 'context': {'what': 'default settings', 'where': f'{self._CL_QUOTA_PATH} output'}} raise ClQuotaException(exc_message) def _get_quotas(self, command): # Get all cl-quota limits and parse them to self._inodes_limits _, s_quota_limits = exec_utility(self._CL_QUOTA_PATH, command) try: data = json.loads(s_quota_limits) except (TypeError, ValueError) as e: raise UnexpectedClQuotaError(raw_response=s_quota_limits) from e if not data: raise UnexpectedClQuotaError() if data['result'] != 'success': raise ClQuotaException({ 'message': data['result'], 'context': data.get('context', {}), 'details': data.get('details') }) return data['items'] def reset_inodes_limits(self): """ Reset inodes limits for all users to package limits :return: """ if not self.is_clquota_present() or not self.is_clquota_activated(): return exec_utility(self._CL_QUOTA_PATH, ['--sync']) def _load_packages_info(self): """ Loads packages info from cl-quota :return: None """ # Exit if cl-quota data already loaded if self._inode_package_dict is not None: return # Exit if cl-quota not present or cl-quota error if not self.is_clquota_present() or not self.is_clquota_activated(): raise QuotaDisabledException() try: packages = self._get_quotas(['--json', '--all-package-limits']) except ClQuotaException: self._inode_package_dict = None raise self._inode_package_dict = {} for package, limits in packages.items(): soft_limit = limits[1][1] if soft_limit == '-': soft_limit = 0 else: soft_limit = int(soft_limit) hard_limit = limits[2][1] if hard_limit == '-': hard_limit = 0 else: hard_limit = int(hard_limit) self._inode_package_dict[package] = {'soft': soft_limit, 'hard': hard_limit} def get_reseller_package_limits(self, package_name_arg): """ Get inodes limits for supplied reseller and package :param package_name_arg: Package name. Only if reseller name is provided. If None - all packages :return: Packages limits dictionary: {package_name: { "soft": 100000, "hard": 200000 } } If package with supplied name not found, dictionary will be empty """ self._load_packages_info() if not package_name_arg: # if package name not provided - return all packages return self._inode_package_dict # Package name provided if package_name_arg in self._inode_package_dict: return {package_name_arg: self._inode_package_dict[package_name_arg]} return {} def __set_error(self, param, package_name, err): return {'message': "%(what)s set error for package=%(package)s%(error)s", 'context': {'what': param, 'package': package_name, 'error': f" [{err}]" if err else ""}} def set_reseller_package_limits(self, package_name, limits_to_set): """ Set inodes limits for package Called from cloudlinux-packages set :param package_name: Package name :param limits_to_set: Limits to set: soft_limit,hard_limit :return: None """ disabled_exc_message = {'message': "%(util)s is disabled", 'context': {'util': 'Quota'}} # Exit if cl-quota not present or cl-quota error if not self.is_clquota_present() or not self.is_clquota_activated(): raise ClQuotaException(disabled_exc_message) limits = limits_to_set.split(',') if len(limits) != 2: # Argument error raise ClQuotaException({'message': "%(util)s argument error", 'context': {'util': 'cl-quota'}}) # set quotas limits cl_quota_cmd = [f'--package={package_name}', f'--soft-limit={limits[0]}', f'--hard-limit={limits[1]}'] ret_code, stdout = exec_utility(self._CL_QUOTA_PATH, cl_quota_cmd) if ret_code != 0 or stdout: # Set limits error raise ClQuotaException(self.__set_error('Inodes limits', package_name, stdout)) def set_package_limits_independently(self, package_name, limits): """ Set inodes limits for package Called from cl-syncpkgs :param package_name: Package name :param limits: Limits to set: {"inodes_soft":1000, "inodes_hard":2000} :return: None """ disabled_exc_message = {'message': "Quota is disabled"} # Exit if cl-quota not present or cl-quota error if not self.is_clquota_present() or not self.is_clquota_activated(): raise ClQuotaException(disabled_exc_message) if len(limits) == 0: raise ClQuotaException({'message': "Unspecified limits for cl-quota"}) if not set(limits) <= {'inodes_soft', 'inodes_hard'}: bad_limits = set(limits) - {'inodes_soft', 'inodes_hard'} raise ClQuotaException({'message': "Incorrect limits for cl-quota: %(bad_limits)s", 'context': {'bad_limits': ', '.join(bad_limits)}}) cl_quota_cmd = [f'--package={package_name}'] if 'inodes_soft' in limits: cl_quota_cmd.append(f"--soft-limit={limits['inodes_soft']}") if 'inodes_hard' in limits: cl_quota_cmd.append(f"--hard-limit={limits['inodes_hard']}") ret_code, stdout = exec_utility(self._CL_QUOTA_PATH, cl_quota_cmd) if ret_code != 0 or stdout: raise ClQuotaException(self.__set_error('Inodes limits', package_name, stdout))
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