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 len=$((len > 0 ? len : 0)) 48 49 before=$(ethtool --json -S $iface --groups rmon | \ 50 jq -r ".[0].rmon[\"${set}-pktsNtoM\"][$bucket].val") 51 52 # Send 10k one way and 20k in the other, to detect counters 53 # mapped to the wrong direction 54 $MZ $neigh -q -c $num_rx -p $len -a own -b bcast -d 10us 55 $MZ $iface -q -c $num_tx -p $len -a own -b bcast -d 10us 56 57 after=$(ethtool --json -S $iface --groups rmon | \ 58 jq -r ".[0].rmon[\"${set}-pktsNtoM\"][$bucket].val") 59 60 delta=$((after - before)) 61 62 expected=$([ $set = rx ] && echo $num_rx || echo $num_tx) 63 64 # Allow some extra tolerance for other packets sent by the stack 65 [ $delta -ge $expected ] && [ $delta -le $((expected + 100)) ] 66} 67 68rmon_histogram() 69{ 70 local iface=$1; shift 71 local neigh=$1; shift 72 local set=$1; shift 73 local nbuckets=0 74 local step= 75 76 RET=0 77 78 while read -r -a bucket; do 79 step="$set-pkts${bucket[0]}to${bucket[1]} on $iface" 80 81 for if in $iface $neigh; do 82 if ! ensure_mtu $if ${bucket[0]}; then 83 log_test_xfail "$if does not support the required MTU for $step" 84 return 85 fi 86 done 87 88 if ! bucket_test $iface $neigh $set $nbuckets ${bucket[0]}; then 89 check_err 1 "$step failed" 90 return 1 91 fi 92 log_test "$step" 93 nbuckets=$((nbuckets + 1)) 94 done < <(ethtool --json -S $iface --groups rmon | \ 95 jq -r ".[0].rmon[\"${set}-pktsNtoM\"][]|[.low, .high]|@tsv" 2>/dev/null) 96 97 if [ $nbuckets -eq 0 ]; then 98 log_test_xfail "$iface does not support $set histogram counters" 99 return 100 fi 101} 102 103rmon_rx_histogram() 104{ 105 rmon_histogram $h1 $h2 rx 106 rmon_histogram $h2 $h1 rx 107} 108 109rmon_tx_histogram() 110{ 111 rmon_histogram $h1 $h2 tx 112 rmon_histogram $h2 $h1 tx 113} 114 115setup_prepare() 116{ 117 h1=${NETIFS[p1]} 118 h2=${NETIFS[p2]} 119 120 for iface in $h1 $h2; do 121 netif_mtu[$iface]=$(ip -j link show dev $iface | jq -r '.[0].mtu') 122 ip link set dev $iface up 123 done 124} 125 126cleanup() 127{ 128 pre_cleanup 129 130 for iface in $h2 $h1; do 131 ip link set dev $iface \ 132 mtu ${netif_mtu[$iface]} \ 133 down 134 done 135} 136 137check_ethtool_counter_group_support 138trap cleanup EXIT 139 140setup_prepare 141setup_wait 142 143tests_run 144 145exit $EXIT_STATUS 146