Commit ff1f7c17 authored by Jakub Kicinski's avatar Jakub Kicinski Committed by David S. Miller
Browse files

netdevsim: add pause frame stats 



Add minimal ethtool interface for testing ethtool pause stats.

v2: add missing static on nsim_ethtool_ops

Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
Reviewed-by: default avatarSaeed Mahameed <saeedm@nvidia.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8c00bd93

drivers/net/netdevsim/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -3,7 +3,7 @@ 
obj-$(CONFIG_NETDEVSIM) += netdevsim.o



netdevsim-objs := \

	netdev.o dev.o fib.o bus.o health.o udp_tunnels.o

	netdev.o dev.o ethtool.o fib.o bus.o health.o udp_tunnels.o



ifeq ($(CONFIG_BPF_SYSCALL),y)

netdevsim-objs += \

drivers/net/netdevsim/ethtool.c

0 → 100644
+64 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

// Copyright (c) 2020 Facebook



#include <linux/debugfs.h>

#include <linux/ethtool.h>

#include <linux/random.h>



#include "netdevsim.h"



static void

nsim_get_pause_stats(struct net_device *dev,

		     struct ethtool_pause_stats *pause_stats)

{

	struct netdevsim *ns = netdev_priv(dev);



	if (ns->ethtool.report_stats_rx)

		pause_stats->rx_pause_frames = 1;

	if (ns->ethtool.report_stats_tx)

		pause_stats->tx_pause_frames = 2;

}



static void

nsim_get_pauseparam(struct net_device *dev, struct ethtool_pauseparam *pause)

{

	struct netdevsim *ns = netdev_priv(dev);



	pause->autoneg = 0; /* We don't support ksettings, so can't pretend */

	pause->rx_pause = ns->ethtool.rx;

	pause->tx_pause = ns->ethtool.tx;

}



static int

nsim_set_pauseparam(struct net_device *dev, struct ethtool_pauseparam *pause)

{

	struct netdevsim *ns = netdev_priv(dev);



	if (pause->autoneg)

		return -EINVAL;



	ns->ethtool.rx = pause->rx_pause;

	ns->ethtool.tx = pause->tx_pause;

	return 0;

}



static const struct ethtool_ops nsim_ethtool_ops = {

	.get_pause_stats	= nsim_get_pause_stats,

	.get_pauseparam		= nsim_get_pauseparam,

	.set_pauseparam		= nsim_set_pauseparam,

};



void nsim_ethtool_init(struct netdevsim *ns)

{

	struct dentry *ethtool, *dir;



	ns->netdev->ethtool_ops = &nsim_ethtool_ops;



	ethtool = debugfs_create_dir("ethtool", ns->nsim_dev->ddir);



	dir = debugfs_create_dir("pause", ethtool);

	debugfs_create_bool("report_stats_rx", 0600, dir,

			    &ns->ethtool.report_stats_rx);

	debugfs_create_bool("report_stats_tx", 0600, dir,

			    &ns->ethtool.report_stats_tx);

}

drivers/net/netdevsim/netdev.c

+1 −0
Original line number Diff line number Diff line
@@ -301,6 +301,7 @@ nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port) 
	ns->nsim_bus_dev = nsim_dev->nsim_bus_dev;

	SET_NETDEV_DEV(dev, &ns->nsim_bus_dev->dev);

	dev->netdev_ops = &nsim_netdev_ops;

	nsim_ethtool_init(ns);



	err = nsim_udp_tunnels_info_create(nsim_dev, dev);

	if (err)

drivers/net/netdevsim/netdevsim.h

+11 −0
Original line number Diff line number Diff line
@@ -50,6 +50,13 @@ struct nsim_ipsec { 
	u32 ok;

};



struct nsim_ethtool {

	bool rx;

	bool tx;

	bool report_stats_rx;

	bool report_stats_tx;

};



struct netdevsim {

	struct net_device *netdev;

	struct nsim_dev *nsim_dev;
@@ -80,12 +87,16 @@ struct netdevsim { 
		u32 ports[2][NSIM_UDP_TUNNEL_N_PORTS];

		struct debugfs_u32_array dfs_ports[2];

	} udp_ports;



	struct nsim_ethtool ethtool;

};



struct netdevsim *

nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port);

void nsim_destroy(struct netdevsim *ns);



void nsim_ethtool_init(struct netdevsim *ns);



void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev);

int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev,

				 struct net_device *dev);