# Copyright 2022 VyOS maintainers and contributors <maintainers@vyos.io> # # This library is free software; you can redistribute it and/or # modify it under the terms of the GNU Lesser General Public # License as published by the Free Software Foundation; either # version 2.1 of the License, or (at your option) any later version. # # This library is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # Lesser General Public License for more details. # # You should have received a copy of the GNU Lesser General Public # License along with this library. If not, see <http://www.gnu.org/licenses/>. from vyos.qos.base import QoSBase class RandomDetect(QoSBase): _parent = 1 # https://man7.org/linux/man-pages/man8/tc.8.html def update(self, config, direction): tmp = f'tc qdisc add dev {self._interface} root handle {self._parent}:0 dsmark indices 8 set_tc_index' self._cmd(tmp) tmp = f'tc filter add dev {self._interface} parent {self._parent}:0 protocol ip prio 1 tcindex mask 0xe0 shift 5' self._cmd(tmp) # Generalized Random Early Detection handle = self._parent +1 tmp = f'tc qdisc add dev {self._interface} parent {self._parent}:0 handle {handle}:0 gred setup DPs 8 default 0 grio' self._cmd(tmp) bandwidth = self._rate_convert(config['bandwidth']) # set VQ (virtual queue) parameters for precedence, precedence_config in config['precedence'].items(): precedence = int(precedence) avg_pkt = int(precedence_config['average_packet']) limit = int(precedence_config['queue_limit']) * avg_pkt min_val = int(precedence_config['minimum_threshold']) * avg_pkt max_val = int(precedence_config['maximum_threshold']) * avg_pkt tmp = f'tc qdisc change dev {self._interface} handle {handle}:0 gred limit {limit} min {min_val} max {max_val} avpkt {avg_pkt} ' burst = (2 * int(precedence_config['minimum_threshold']) + int(precedence_config['maximum_threshold'])) // 3 probability = 1 / int(precedence_config['mark_probability']) tmp += f'burst {burst} bandwidth {bandwidth} probability {probability} DP {precedence} prio {8 - precedence:x}' self._cmd(tmp) # call base class super().update(config, direction)