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