mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
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115 lines
2.9 KiB
C++
115 lines
2.9 KiB
C++
/* Interface related functions.
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*
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* These functions are used to manage a network interface.
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* Most of them make use of Linux-specific APIs.
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*
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* Author: Steffen Vogel <post@steffenvogel.de>
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* SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
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* SPDX-License-Identifier: Apache-2.0
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*/
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#pragma once
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#include <list>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <villas/log.hpp>
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#ifndef SO_MARK
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#define SO_MARK \
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36 // Workaround: add missing constant for OPAL-RT Redhawk target
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#endif
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// Forward declarations
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struct nl_addr;
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struct rtnl_link;
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struct rtnl_qdisc;
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namespace villas {
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namespace node {
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// Forward declarations
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class Node;
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class SuperNode;
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} // namespace node
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namespace kernel {
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// Interface data structure
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class Interface {
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public:
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struct rtnl_link *nl_link; // libnl3: Handle of interface.
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struct rtnl_qdisc
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*tc_qdisc; // libnl3: Root priority queuing discipline (qdisc).
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protected:
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int affinity; // IRQ / Core Affinity of this interface.
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std::list<int> irqs; // List of IRQs of the NIC.
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std::list<node::Node *> nodes; // List of nodes which use this interface.
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Logger logger;
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public:
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// Add a new interface to the global list and lookup name, irqs...
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Interface(struct rtnl_link *link, int affinity = 0);
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~Interface();
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/* Start interface.
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*
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* This setups traffic controls queue discs, network emulation and
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* maps interface IRQs according to affinity.
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*
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* @param i A pointer to the interface structure.
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* @retval 0 Success. Everything went well.
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* @retval <0 Error. Something went wrong.
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*/
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int start();
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/* Stop interface
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*
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* This resets traffic qdiscs ant network emulation
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* and maps interface IRQs to all CPUs.
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*
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* @param i A pointer to the interface structure.
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* @retval 0 Success. Everything went well.
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* @retval <0 Error. Something went wrong.
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*/
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int stop();
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/* Find existing or create new interface instance on which packets for a certain destination
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* will leave the system.
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*/
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static Interface *getEgress(struct sockaddr *sa, node::SuperNode *sn);
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/* Get all IRQs for this interface.
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*
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* Only MSI IRQs are determined by looking at:
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* /sys/class/net/{ifname}/device/msi_irqs/
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*
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* @param i A pointer to the interface structure
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* @retval 0 Success. Everything went well.
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* @retval <0 Error. Something went wrong.
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*/
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int getIRQs();
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/* Change the SMP affinity of NIC interrupts.
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*
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* @param i A pointer to the interface structure
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* @param affinity A mask specifying which cores should handle this interrupt.
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* @retval 0 Success. Everything went well.
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* @retval <0 Error. Something went wrong.
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*/
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int setAffinity(int affinity);
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std::string getName() const;
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void addNode(node::Node *n) { nodes.push_back(n); }
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};
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} // namespace kernel
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} // namespace villas
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