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