mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
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107 lines
3.2 KiB
C++
107 lines
3.2 KiB
C++
/** Traffic control (tc): setup interface queuing desciplines.
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*
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* VILLASnode uses these functions to setup the network emulation feature.
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*
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
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*
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* VILLASnode
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************************/
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#include <netlink/route/cls/fw.h>
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#include <netlink/route/qdisc/prio.h>
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#include <linux/if_ether.h>
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#include <villas/utils.hpp>
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#include <villas/kernel/kernel.hpp>
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#include <villas/kernel/if.hpp>
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#include <villas/kernel/tc.hpp>
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#include <villas/kernel/nl.hpp>
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using namespace villas;
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using namespace villas::kernel;
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int villas::kernel::tc::prio(Interface *i, struct rtnl_qdisc **qd, tc_hdl_t handle, tc_hdl_t parent, int bands)
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{
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int ret;
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struct nl_sock *sock = nl::init();
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struct rtnl_qdisc *q = rtnl_qdisc_alloc();
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ret = kernel::module_load("sch_prio");
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if (ret)
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error("Failed to load kernel module: sch_prio (%d)", ret);
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/* This is the default priomap used by the tc-prio qdisc
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* We will use the first 'bands' bands internally */
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uint8_t map[] = QDISC_PRIO_DEFAULT_PRIOMAP;
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for (unsigned i = 0; i < ARRAY_LEN(map); i++)
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map[i] += bands;
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rtnl_tc_set_link(TC_CAST(q), i->nl_link);
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rtnl_tc_set_parent(TC_CAST(q), parent);
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rtnl_tc_set_handle(TC_CAST(q), handle);
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rtnl_tc_set_kind(TC_CAST(q), "prio");
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rtnl_qdisc_prio_set_bands(q, bands + 3);
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rtnl_qdisc_prio_set_priomap(q, map, sizeof(map));
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ret = rtnl_qdisc_add(sock, q, NLM_F_CREATE | NLM_F_REPLACE);
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*qd = q;
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debug(LOG_TC | 3, "Added prio qdisc with %d bands to interface '%s'", bands, rtnl_link_get_name(i->nl_link));
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return ret;
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}
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int villas::kernel::tc::mark(Interface *i, struct rtnl_cls **cls, tc_hdl_t flowid, uint32_t mark)
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{
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int ret;
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struct nl_sock *sock = nl::init();
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struct rtnl_cls *c = rtnl_cls_alloc();
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ret = kernel::module_load("cls_fw");
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if (ret)
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error("Failed to load kernel module: cls_fw");
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rtnl_tc_set_link(TC_CAST(c), i->nl_link);
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rtnl_tc_set_handle(TC_CAST(c), mark);
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rtnl_tc_set_kind(TC_CAST(c), "fw");
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rtnl_cls_set_protocol(c, ETH_P_ALL);
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rtnl_fw_set_classid(c, flowid);
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rtnl_fw_set_mask(c, 0xFFFFFFFF);
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ret = rtnl_cls_add(sock, c, NLM_F_CREATE);
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*cls = c;
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debug(LOG_TC | 3, "Added fwmark classifier with mark %d to interface '%s'", mark, rtnl_link_get_name(i->nl_link));
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return ret;
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}
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int villas::kernel::tc::reset(Interface *i)
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{
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struct nl_sock *sock = nl::init();
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/* We restore the default pfifo_fast qdisc, by deleting ours */
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return rtnl_qdisc_delete(sock, i->tc_qdisc);
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}
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