1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3 4ALL_TESTS=" 5 rmon_rx_histogram 6 rmon_tx_histogram 7" 8 9NUM_NETIFS=2 10lib_dir=$(dirname "$0") 11source "$lib_dir"/../../../net/forwarding/lib.sh 12 13ETH_FCS_LEN=4 14ETH_HLEN=$((6+6+2)) 15 16declare -A netif_mtu 17 18ensure_mtu() 19{ 20 local iface=$1; shift 21 local len=$1; shift 22 local current=$(ip -j link show dev $iface | jq -r '.[0].mtu') 23 local required=$((len - ETH_HLEN - ETH_FCS_LEN)) 24 25 if [ $current -lt $required ]; then 26 ip link set dev $iface mtu $required || return 1 27 fi 28} 29 30bucket_test() 31{ 32 local iface=$1; shift 33 local neigh=$1; shift 34 local set=$1; shift 35 local bucket=$1; shift 36 local len=$1; shift 37 local num_rx=10000 38 local num_tx=20000 39 local expected= 40 local before= 41 local after= 42 local delta= 43 44 # Mausezahn does not include FCS bytes in its length - but the 45 # histogram counters do 46 len=$((len - ETH_FCS_LEN)) 47 48 before=$(ethtool --json -S $iface --groups rmon | \ 49 jq -r ".[0].rmon[\"${set}-pktsNtoM\"][$bucket].val") 50 51 # Send 10k one way and 20k in the other, to detect counters 52 # mapped to the wrong direction 53 $MZ $neigh -q -c $num_rx -p $len -a own -b bcast -d 10us 54 $MZ $iface -q -c $num_tx -p $len -a own -b bcast -d 10us 55 56 after=$(ethtool --json -S $iface --groups rmon | \ 57 jq -r ".[0].rmon[\"${set}-pktsNtoM\"][$bucket].val") 58 59 delta=$((after - before)) 60 61 expected=$([ $set = rx ] && echo $num_rx || echo $num_tx) 62 63 # Allow some extra tolerance for other packets sent by the stack 64 [ $delta -ge $expected ] && [ $delta -le $((expected + 100)) ] 65} 66 67rmon_histogram() 68{ 69 local iface=$1; shift 70 local neigh=$1; shift 71 local set=$1; shift 72 local nbuckets=0 73 local step= 74 75 RET=0 76 77 while read -r -a bucket; do 78 step="$set-pkts${bucket[0]}to${bucket[1]} on $iface" 79 80 for if in $iface $neigh; do 81 if ! ensure_mtu $if ${bucket[0]}; then 82 log_test_xfail "$if does not support the required MTU for $step" 83 return 84 fi 85 done 86 87 if ! bucket_test $iface $neigh $set $nbuckets ${bucket[0]}; then 88 check_err 1 "$step failed" 89 return 1 90 fi 91 log_test "$step" 92 nbuckets=$((nbuckets + 1)) 93 done < <(ethtool --json -S $iface --groups rmon | \ 94 jq -r ".[0].rmon[\"${set}-pktsNtoM\"][]|[.low, .high]|@tsv" 2>/dev/null) 95 96 if [ $nbuckets -eq 0 ]; then 97 log_test_xfail "$iface does not support $set histogram counters" 98 return 99 fi 100} 101 102rmon_rx_histogram() 103{ 104 rmon_histogram $h1 $h2 rx 105 rmon_histogram $h2 $h1 rx 106} 107 108rmon_tx_histogram() 109{ 110 rmon_histogram $h1 $h2 tx 111 rmon_histogram $h2 $h1 tx 112} 113 114setup_prepare() 115{ 116 h1=${NETIFS[p1]} 117 h2=${NETIFS[p2]} 118 119 for iface in $h1 $h2; do 120 netif_mtu[$iface]=$(ip -j link show dev $iface | jq -r '.[0].mtu') 121 ip link set dev $iface up 122 done 123} 124 125cleanup() 126{ 127 pre_cleanup 128 129 for iface in $h2 $h1; do 130 ip link set dev $iface \ 131 mtu ${netif_mtu[$iface]} \ 132 down 133 done 134} 135 136check_ethtool_counter_group_support 137trap cleanup EXIT 138 139setup_prepare 140setup_wait 141 142tests_run 143 144exit $EXIT_STATUS 145