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Merge branch 'netdevsim-add-ethtool-coalesce-and-ring-settings' 

Antonio Cardace says:

====================
netdevsim: add ethtool coalesce and ring settings

Output of ethtool-ring.sh and ethtool-coalesce.sh selftests:

  # ./ethtool-ring.sh
  PASSED all 4 checks
  # ./ethtool-coalesce.sh
  PASSED all 22 checks
  # ./ethtool-pause.sh
  PASSED all 7 checks
====================

Link: https://lore.kernel.org/r/20201118204522.5660-1-acardace@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2020-11-20 12:51:56 -08:00
parent fc9840fbef fbb7a1f813
commit 2ed03e5a84
7 changed files with 352 additions and 73 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

82
drivers/net/netdevsim/ethtool.c
View File

@ -13,9 +13,9 @@ nsim_get_pause_stats(struct net_device *dev,
{
struct netdevsim *ns = netdev_priv(dev);
if (ns->ethtool.report_stats_rx)
if (ns->ethtool.pauseparam.report_stats_rx)
pause_stats->rx_pause_frames = 1;
if (ns->ethtool.report_stats_tx)
if (ns->ethtool.pauseparam.report_stats_tx)
pause_stats->tx_pause_frames = 2;
}
@ -25,8 +25,8 @@ 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;
pause->rx_pause = ns->ethtool.pauseparam.rx;
pause->tx_pause = ns->ethtool.pauseparam.tx;
}
static int
@ -37,28 +37,88 @@ nsim_set_pauseparam(struct net_device *dev, struct ethtool_pauseparam *pause)
if (pause->autoneg)
return -EINVAL;
ns->ethtool.rx = pause->rx_pause;
ns->ethtool.tx = pause->tx_pause;
ns->ethtool.pauseparam.rx = pause->rx_pause;
ns->ethtool.pauseparam.tx = pause->tx_pause;
return 0;
}
static int nsim_get_coalesce(struct net_device *dev,
struct ethtool_coalesce *coal)
{
struct netdevsim *ns = netdev_priv(dev);
memcpy(coal, &ns->ethtool.coalesce, sizeof(ns->ethtool.coalesce));
return 0;
}
static int nsim_set_coalesce(struct net_device *dev,
struct ethtool_coalesce *coal)
{
struct netdevsim *ns = netdev_priv(dev);
memcpy(&ns->ethtool.coalesce, coal, sizeof(ns->ethtool.coalesce));
return 0;
}
static void nsim_get_ringparam(struct net_device *dev,
struct ethtool_ringparam *ring)
{
struct netdevsim *ns = netdev_priv(dev);
memcpy(ring, &ns->ethtool.ring, sizeof(ns->ethtool.ring));
}
static int nsim_set_ringparam(struct net_device *dev,
struct ethtool_ringparam *ring)
{
struct netdevsim *ns = netdev_priv(dev);
memcpy(&ns->ethtool.ring, ring, sizeof(ns->ethtool.ring));
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,
.supported_coalesce_params = ETHTOOL_COALESCE_ALL_PARAMS,
.get_pause_stats = nsim_get_pause_stats,
.get_pauseparam = nsim_get_pauseparam,
.set_pauseparam = nsim_set_pauseparam,
.set_coalesce = nsim_set_coalesce,
.get_coalesce = nsim_get_coalesce,
.get_ringparam = nsim_get_ringparam,
.set_ringparam = nsim_set_ringparam,
};
static void nsim_ethtool_ring_init(struct netdevsim *ns)
{
ns->ethtool.ring.rx_max_pending = 4096;
ns->ethtool.ring.rx_jumbo_max_pending = 4096;
ns->ethtool.ring.rx_mini_max_pending = 4096;
ns->ethtool.ring.tx_max_pending = 4096;
}
void nsim_ethtool_init(struct netdevsim *ns)
{
struct dentry *ethtool, *dir;
ns->netdev->ethtool_ops = &nsim_ethtool_ops;
nsim_ethtool_ring_init(ns);
ethtool = debugfs_create_dir("ethtool", ns->nsim_dev_port->ddir);
dir = debugfs_create_dir("pause", ethtool);
debugfs_create_bool("report_stats_rx", 0600, dir,
&ns->ethtool.report_stats_rx);
&ns->ethtool.pauseparam.report_stats_rx);
debugfs_create_bool("report_stats_tx", 0600, dir,
&ns->ethtool.report_stats_tx);
&ns->ethtool.pauseparam.report_stats_tx);
dir = debugfs_create_dir("ring", ethtool);
debugfs_create_u32("rx_max_pending", 0600, dir,
&ns->ethtool.ring.rx_max_pending);
debugfs_create_u32("rx_jumbo_max_pending", 0600, dir,
&ns->ethtool.ring.rx_jumbo_max_pending);
debugfs_create_u32("rx_mini_max_pending", 0600, dir,
&ns->ethtool.ring.rx_mini_max_pending);
debugfs_create_u32("tx_max_pending", 0600, dir,
&ns->ethtool.ring.tx_max_pending);
}

9
drivers/net/netdevsim/netdevsim.h
View File

@ -15,6 +15,7 @@
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/ethtool.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/netdevice.h>
@ -51,13 +52,19 @@ struct nsim_ipsec {
u32 ok;
};
struct nsim_ethtool {
struct nsim_ethtool_pauseparam {
bool rx;
bool tx;
bool report_stats_rx;
bool report_stats_tx;
};
struct nsim_ethtool {
struct nsim_ethtool_pauseparam pauseparam;
struct ethtool_coalesce coalesce;
struct ethtool_ringparam ring;
};
struct netdevsim {
struct net_device *netdev;
struct nsim_dev *nsim_dev;

1
include/linux/ethtool.h
View File

@ -215,6 +215,7 @@ bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
#define ETHTOOL_COALESCE_TX_USECS_HIGH BIT(19)
#define ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH BIT(20)
#define ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL BIT(21)
#define ETHTOOL_COALESCE_ALL_PARAMS GENMASK(21, 0)
#define ETHTOOL_COALESCE_USECS \
(ETHTOOL_COALESCE_RX_USECS | ETHTOOL_COALESCE_TX_USECS)

132
tools/testing/selftests/drivers/net/netdevsim/ethtool-coalesce.sh Executable file
View File

@ -0,0 +1,132 @@
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0-only
source ethtool-common.sh
function get_value {
local query="${SETTINGS_MAP[$1]}"
echo $(ethtool -c $NSIM_NETDEV | \
awk -F':' -v pattern="$query:" '$0 ~ pattern {gsub(/[ \t]/, "", $2); print $2}')
}
function update_current_settings {
for key in ${!SETTINGS_MAP[@]}; do
CURRENT_SETTINGS[$key]=$(get_value $key)
done
echo ${CURRENT_SETTINGS[@]}
}
if ! ethtool -h | grep -q coalesce; then
echo "SKIP: No --coalesce support in ethtool"
exit 4
fi
NSIM_NETDEV=$(make_netdev)
set -o pipefail
declare -A SETTINGS_MAP=(
["rx-frames-low"]="rx-frame-low"
["tx-frames-low"]="tx-frame-low"
["rx-frames-high"]="rx-frame-high"
["tx-frames-high"]="tx-frame-high"
["rx-usecs"]="rx-usecs"
["rx-frames"]="rx-frames"
["rx-usecs-irq"]="rx-usecs-irq"
["rx-frames-irq"]="rx-frames-irq"
["tx-usecs"]="tx-usecs"
["tx-frames"]="tx-frames"
["tx-usecs-irq"]="tx-usecs-irq"
["tx-frames-irq"]="tx-frames-irq"
["stats-block-usecs"]="stats-block-usecs"
["pkt-rate-low"]="pkt-rate-low"
["rx-usecs-low"]="rx-usecs-low"
["tx-usecs-low"]="tx-usecs-low"
["pkt-rate-high"]="pkt-rate-high"
["rx-usecs-high"]="rx-usecs-high"
["tx-usecs-high"]="tx-usecs-high"
["sample-interval"]="sample-interval"
)
declare -A CURRENT_SETTINGS=(
["rx-frames-low"]=""
["tx-frames-low"]=""
["rx-frames-high"]=""
["tx-frames-high"]=""
["rx-usecs"]=""
["rx-frames"]=""
["rx-usecs-irq"]=""
["rx-frames-irq"]=""
["tx-usecs"]=""
["tx-frames"]=""
["tx-usecs-irq"]=""
["tx-frames-irq"]=""
["stats-block-usecs"]=""
["pkt-rate-low"]=""
["rx-usecs-low"]=""
["tx-usecs-low"]=""
["pkt-rate-high"]=""
["rx-usecs-high"]=""
["tx-usecs-high"]=""
["sample-interval"]=""
)
declare -A EXPECTED_SETTINGS=(
["rx-frames-low"]=""
["tx-frames-low"]=""
["rx-frames-high"]=""
["tx-frames-high"]=""
["rx-usecs"]=""
["rx-frames"]=""
["rx-usecs-irq"]=""
["rx-frames-irq"]=""
["tx-usecs"]=""
["tx-frames"]=""
["tx-usecs-irq"]=""
["tx-frames-irq"]=""
["stats-block-usecs"]=""
["pkt-rate-low"]=""
["rx-usecs-low"]=""
["tx-usecs-low"]=""
["pkt-rate-high"]=""
["rx-usecs-high"]=""
["tx-usecs-high"]=""
["sample-interval"]=""
)
# populate the expected settings map
for key in ${!SETTINGS_MAP[@]}; do
EXPECTED_SETTINGS[$key]=$(get_value $key)
done
# test
for key in ${!SETTINGS_MAP[@]}; do
value=$((RANDOM % $((2**32-1))))
ethtool -C $NSIM_NETDEV "$key" "$value"
EXPECTED_SETTINGS[$key]="$value"
expected=${EXPECTED_SETTINGS[@]}
current=$(update_current_settings)
check $? "$current" "$expected"
set +x
done
# bool settings which ethtool displays on the same line
ethtool -C $NSIM_NETDEV adaptive-rx on
s=$(ethtool -c $NSIM_NETDEV | grep -q "Adaptive RX: on TX: off")
check $? "$s" ""
ethtool -C $NSIM_NETDEV adaptive-tx on
s=$(ethtool -c $NSIM_NETDEV | grep -q "Adaptive RX: on TX: on")
check $? "$s" ""
if [ $num_errors -eq 0 ]; then
echo "PASSED all $((num_passes)) checks"
exit 0
else
echo "FAILED $num_errors/$((num_errors+num_passes)) checks"
exit 1
fi

53
tools/testing/selftests/drivers/net/netdevsim/ethtool-common.sh Normal file
View File

@ -0,0 +1,53 @@
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0-only
NSIM_ID=$((RANDOM % 1024))
NSIM_DEV_SYS=/sys/bus/netdevsim/devices/netdevsim$NSIM_ID
NSIM_DEV_DFS=/sys/kernel/debug/netdevsim/netdevsim$NSIM_ID/ports/0
NSIM_NETDEV=
num_passes=0
num_errors=0
function cleanup_nsim {
if [ -e $NSIM_DEV_SYS ]; then
echo $NSIM_ID > /sys/bus/netdevsim/del_device
fi
}
function cleanup {
cleanup_nsim
}
trap cleanup EXIT
function check {
local code=$1
local str=$2
local exp_str=$3
if [ $code -ne 0 ]; then
((num_errors++))
return
fi
if [ "$str" != "$exp_str" ]; then
echo -e "Expected: '$exp_str', got '$str'"
((num_errors++))
return
fi
((num_passes++))
}
function make_netdev {
# Make a netdevsim
old_netdevs=$(ls /sys/class/net)
if ! $(lsmod | grep -q netdevsim); then
modprobe netdevsim
fi
echo $NSIM_ID > /sys/bus/netdevsim/new_device
# get new device name
ls /sys/bus/netdevsim/devices/netdevsim${NSIM_ID}/net/
}

63
tools/testing/selftests/drivers/net/netdevsim/ethtool-pause.sh
View File

@ -1,60 +1,7 @@
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0-only
NSIM_ID=$((RANDOM % 1024))
NSIM_DEV_SYS=/sys/bus/netdevsim/devices/netdevsim$NSIM_ID
NSIM_DEV_DFS=/sys/kernel/debug/netdevsim/netdevsim$NSIM_ID/ports/0
NSIM_NETDEV=
num_passes=0
num_errors=0
function cleanup_nsim {
if [ -e $NSIM_DEV_SYS ]; then
echo $NSIM_ID > /sys/bus/netdevsim/del_device
fi
}
function cleanup {
cleanup_nsim
}
trap cleanup EXIT
function get_netdev_name {
local -n old=$1
new=$(ls /sys/class/net)
for netdev in $new; do
for check in $old; do
[ $netdev == $check ] && break
done
if [ $netdev != $check ]; then
echo $netdev
break
fi
done
}
function check {
local code=$1
local str=$2
local exp_str=$3
if [ $code -ne 0 ]; then
((num_errors++))
return
fi
if [ "$str" != "$exp_str" ]; then
echo -e "Expected: '$exp_str', got '$str'"
((num_errors++))
return
fi
((num_passes++))
}
source ethtool-common.sh
# Bail if ethtool is too old
if ! ethtool -h | grep include-stat 2>&1 >/dev/null; then
@ -62,13 +9,7 @@ if ! ethtool -h | grep include-stat 2>&1 >/dev/null; then
exit 4
fi
# Make a netdevsim
old_netdevs=$(ls /sys/class/net)
modprobe netdevsim
echo $NSIM_ID > /sys/bus/netdevsim/new_device
NSIM_NETDEV=`get_netdev_name old_netdevs`
NSIM_NETDEV=$(make_netdev)
set -o pipefail

85
tools/testing/selftests/drivers/net/netdevsim/ethtool-ring.sh Executable file
View File

@ -0,0 +1,85 @@
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0-only
source ethtool-common.sh
function get_value {
local query="${SETTINGS_MAP[$1]}"
echo $(ethtool -g $NSIM_NETDEV | \
tail -n +$CURR_SETT_LINE | \
awk -F':' -v pattern="$query:" '$0 ~ pattern {gsub(/[\t ]/, "", $2); print $2}')
}
function update_current_settings {
for key in ${!SETTINGS_MAP[@]}; do
CURRENT_SETTINGS[$key]=$(get_value $key)
done
echo ${CURRENT_SETTINGS[@]}
}
if ! ethtool -h | grep -q set-ring >/dev/null; then
echo "SKIP: No --set-ring support in ethtool"
exit 4
fi
NSIM_NETDEV=$(make_netdev)
set -o pipefail
declare -A SETTINGS_MAP=(
["rx"]="RX"
["rx-mini"]="RX Mini"
["rx-jumbo"]="RX Jumbo"
["tx"]="TX"
)
declare -A EXPECTED_SETTINGS=(
["rx"]=""
["rx-mini"]=""
["rx-jumbo"]=""
["tx"]=""
)
declare -A CURRENT_SETTINGS=(
["rx"]=""
["rx-mini"]=""
["rx-jumbo"]=""
["tx"]=""
)
MAX_VALUE=$((RANDOM % $((2**32-1))))
RING_MAX_LIST=$(ls $NSIM_DEV_DFS/ethtool/ring/)
for ring_max_entry in $RING_MAX_LIST; do
echo $MAX_VALUE > $NSIM_DEV_DFS/ethtool/ring/$ring_max_entry
done
CURR_SETT_LINE=$(ethtool -g $NSIM_NETDEV | grep -i -m1 -n 'Current hardware settings' | cut -f1 -d:)
# populate the expected settings map
for key in ${!SETTINGS_MAP[@]}; do
EXPECTED_SETTINGS[$key]=$(get_value $key)
done
# test
for key in ${!SETTINGS_MAP[@]}; do
value=$((RANDOM % $MAX_VALUE))
ethtool -G $NSIM_NETDEV "$key" "$value"
EXPECTED_SETTINGS[$key]="$value"
expected=${EXPECTED_SETTINGS[@]}
current=$(update_current_settings)
check $? "$current" "$expected"
set +x
done
if [ $num_errors -eq 0 ]; then
echo "PASSED all $((num_passes)) checks"
exit 0
else
echo "FAILED $num_errors/$((num_errors+num_passes)) checks"
exit 1
fi