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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: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2020-09-14 17:11:54 -07:00 committed by David S. Miller
parent 8c00bd936f
commit ff1f7c17fb
4 changed files with 77 additions and 1 deletions
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2
drivers/net/netdevsim/Makefile
View File

@ -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 += \

64
drivers/net/netdevsim/ethtool.c Normal file
View File

@ -0,0 +1,64 @@
// 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);
}

1
drivers/net/netdevsim/netdev.c
View File

@ -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)

11
drivers/net/netdevsim/netdevsim.h
View File

@ -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);