mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
synced 2025-03-09 00:00:00 +01:00
141 lines
3.6 KiB
C++
141 lines
3.6 KiB
C++
/** Interface related functions
|
|
*
|
|
* These functions are used to manage a network interface.
|
|
* Most of them make use of Linux-specific APIs.
|
|
*
|
|
* @file
|
|
* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
|
|
* @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
|
|
* @license GNU General Public License (version 3)
|
|
*
|
|
* VILLASnode
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*********************************************************************************/
|
|
|
|
/** @addtogroup kernel Kernel
|
|
* @{
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <list>
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
|
|
#include <villas/log.hpp>
|
|
|
|
#ifndef SO_MARK
|
|
#define SO_MARK 36 /**< Workaround: add missing constant for OPAL-RT Redhawk target */
|
|
#endif
|
|
|
|
/* Forward declarations */
|
|
struct vnode;
|
|
struct nl_addr;
|
|
struct rtnl_link;
|
|
struct rtnl_qdisc;
|
|
|
|
namespace villas {
|
|
|
|
namespace node {
|
|
|
|
/* Forward declarations */
|
|
class SuperNode;
|
|
|
|
}
|
|
|
|
namespace kernel {
|
|
|
|
/** Interface data structure */
|
|
class Interface {
|
|
|
|
public:
|
|
struct rtnl_link *nl_link; /**< libnl3: Handle of interface. */
|
|
struct rtnl_qdisc *tc_qdisc; /**< libnl3: Root priority queuing discipline (qdisc). */
|
|
|
|
protected:
|
|
int affinity; /**< IRQ / Core Affinity of this interface. */
|
|
|
|
std::list<int> irqs; /**< List of IRQs of the NIC. */
|
|
std::list<struct vnode *> nodes; /**< List of nodes which use this interface. */
|
|
|
|
Logger logger;
|
|
|
|
public:
|
|
/** Add a new interface to the global list and lookup name, irqs... */
|
|
Interface(struct rtnl_link *link, int affinity = 0);
|
|
~Interface();
|
|
|
|
/** Start interface.
|
|
*
|
|
* This setups traffic controls queue discs, network emulation and
|
|
* maps interface IRQs according to affinity.
|
|
*
|
|
* @param i A pointer to the interface structure.
|
|
* @retval 0 Success. Everything went well.
|
|
* @retval <0 Error. Something went wrong.
|
|
*/
|
|
int start();
|
|
|
|
/** Stop interface
|
|
*
|
|
* This resets traffic qdiscs ant network emulation
|
|
* and maps interface IRQs to all CPUs.
|
|
*
|
|
* @param i A pointer to the interface structure.
|
|
* @retval 0 Success. Everything went well.
|
|
* @retval <0 Error. Something went wrong.
|
|
*/
|
|
int stop();
|
|
|
|
/** Find existing or create new interface instance on which packets for a certain destination
|
|
* will leave the system.
|
|
*/
|
|
static
|
|
Interface *
|
|
getEgress(struct sockaddr *sa, villas::node::SuperNode *sn);
|
|
|
|
/** Get all IRQs for this interface.
|
|
*
|
|
* Only MSI IRQs are determined by looking at:
|
|
* /sys/class/net/{ifname}/device/msi_irqs/
|
|
*
|
|
* @param i A pointer to the interface structure
|
|
* @retval 0 Success. Everything went well.
|
|
* @retval <0 Error. Something went wrong.
|
|
*/
|
|
int getIRQs();
|
|
|
|
/** Change the SMP affinity of NIC interrupts.
|
|
*
|
|
* @param i A pointer to the interface structure
|
|
* @param affinity A mask specifying which cores should handle this interrupt.
|
|
* @retval 0 Success. Everything went well.
|
|
* @retval <0 Error. Something went wrong.
|
|
*/
|
|
int setAffinity(int affinity);
|
|
|
|
std::string getName() const;
|
|
|
|
void addNode(struct vnode *n)
|
|
{
|
|
nodes.push_back(n);
|
|
}
|
|
};
|
|
|
|
} /* namespace kernel */
|
|
} /* namespace villas */
|
|
|
|
/** @} */
|