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|
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
ALL_TESTS="
rmon_rx_histogram
rmon_tx_histogram
"
NUM_NETIFS=2
source lib.sh
ETH_FCS_LEN=4
ETH_HLEN=$((6+6+2))
declare -A netif_mtu
ensure_mtu()
{
local iface=$1; shift
local len=$1; shift
local current=$(ip -j link show dev $iface | jq -r '.[0].mtu')
local required=$((len - ETH_HLEN - ETH_FCS_LEN))
if [ $current -lt $required ]; then
ip link set dev $iface mtu $required || return 1
fi
}
bucket_test()
{
local iface=$1; shift
local neigh=$1; shift
local set=$1; shift
local bucket=$1; shift
local len=$1; shift
local num_rx=10000
local num_tx=20000
local expected=
local before=
local after=
local delta=
# Mausezahn does not include FCS bytes in its length - but the
# histogram counters do
len=$((len - ETH_FCS_LEN))
before=$(ethtool --json -S $iface --groups rmon | \
jq -r ".[0].rmon[\"${set}-pktsNtoM\"][$bucket].val")
# Send 10k one way and 20k in the other, to detect counters
# mapped to the wrong direction
$MZ $neigh -q -c $num_rx -p $len -a own -b bcast -d 10us
$MZ $iface -q -c $num_tx -p $len -a own -b bcast -d 10us
after=$(ethtool --json -S $iface --groups rmon | \
jq -r ".[0].rmon[\"${set}-pktsNtoM\"][$bucket].val")
delta=$((after - before))
expected=$([ $set = rx ] && echo $num_rx || echo $num_tx)
# Allow some extra tolerance for other packets sent by the stack
[ $delta -ge $expected ] && [ $delta -le $((expected + 100)) ]
}
rmon_histogram()
{
local iface=$1; shift
local neigh=$1; shift
local set=$1; shift
local nbuckets=0
local step=
RET=0
while read -r -a bucket; do
step="$set-pkts${bucket[0]}to${bucket[1]} on $iface"
for if in $iface $neigh; do
if ! ensure_mtu $if ${bucket[0]}; then
log_test_skip "$if does not support the required MTU for $step"
return
fi
done
if ! bucket_test $iface $neigh $set $nbuckets ${bucket[0]}; then
check_err 1 "$step failed"
return 1
fi
log_test "$step"
nbuckets=$((nbuckets + 1))
done < <(ethtool --json -S $iface --groups rmon | \
jq -r ".[0].rmon[\"${set}-pktsNtoM\"][]|[.low, .high]|@tsv" 2>/dev/null)
if [ $nbuckets -eq 0 ]; then
log_test_skip "$iface does not support $set histogram counters"
return
fi
}
rmon_rx_histogram()
{
rmon_histogram $h1 $h2 rx
rmon_histogram $h2 $h1 rx
}
rmon_tx_histogram()
{
rmon_histogram $h1 $h2 tx
rmon_histogram $h2 $h1 tx
}
setup_prepare()
{
h1=${NETIFS[p1]}
h2=${NETIFS[p2]}
for iface in $h1 $h2; do
netif_mtu[$iface]=$(ip -j link show dev $iface | jq -r '.[0].mtu')
ip link set dev $iface up
done
}
cleanup()
{
pre_cleanup
for iface in $h2 $h1; do
ip link set dev $iface \
mtu ${netif_mtu[$iface]} \
down
done
}
check_ethtool_counter_group_support
trap cleanup EXIT
setup_prepare
setup_wait
tests_run
exit $EXIT_STATUS
|
