1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3#shellcheck disable=SC2034 # SC does not see the global variables 4#shellcheck disable=SC2317,SC2329 # unused functions 5 6ALL_TESTS=" 7 rmon_rx_histogram 8 rmon_tx_histogram 9" 10 11: "${DRIVER_TEST_CONFORMANT:=yes}" 12NUM_NETIFS=2 13lib_dir=$(dirname "$0") 14source "$lib_dir"/../../../net/forwarding/lib.sh 15source "$lib_dir"/../../../kselftest/ktap_helpers.sh 16 17UINT32_MAX=$((2**32 - 1)) 18ETH_FCS_LEN=4 19ETH_HLEN=$((6+6+2)) 20TEST_NAME=$(basename "$0" .sh) 21 22declare -A netif_mtu 23 24ensure_mtu() 25{ 26 local iface=$1; shift 27 local len=$1; shift 28 local required=$((len - ETH_HLEN - ETH_FCS_LEN)) 29 local current 30 31 current=$(run_on "$iface" \ 32 ip -j link show dev "$iface" | jq -r '.[0].mtu') 33 if [ "$current" -lt "$required" ]; then 34 run_on "$iface" ip link set dev "$iface" mtu "$required" \ 35 || return 1 36 fi 37} 38 39bucket_test() 40{ 41 local iface=$1; shift 42 local neigh=$1; shift 43 local set=$1; shift 44 local bucket=$1; shift 45 local len=$1; shift 46 local num_rx=10000 47 local num_tx=20000 48 local expected= 49 local before= 50 local after= 51 local delta= 52 53 # Mausezahn does not include FCS bytes in its length - but the 54 # histogram counters do 55 len=$((len - ETH_FCS_LEN)) 56 len=$((len > 0 ? len : 0)) 57 58 before=$(run_on "$iface" ethtool --json -S "$iface" --groups rmon | \ 59 jq -r ".[0].rmon[\"${set}-pktsNtoM\"][$bucket].val") 60 61 # Send 10k one way and 20k in the other, to detect counters 62 # mapped to the wrong direction 63 run_on "$neigh" \ 64 "$MZ" "$neigh" -q -c "$num_rx" -p "$len" -a own -b bcast -d 10us 65 run_on "$iface" \ 66 "$MZ" "$iface" -q -c "$num_tx" -p "$len" -a own -b bcast -d 10us 67 68 after=$(run_on "$iface" ethtool --json -S "$iface" --groups rmon | \ 69 jq -r ".[0].rmon[\"${set}-pktsNtoM\"][$bucket].val") 70 71 delta=$((after - before)) 72 73 expected=$([ "$set" = rx ] && echo "$num_rx" || echo "$num_tx") 74 75 [ "$delta" -ge "$expected" ] && [ "$delta" -le "$UINT32_MAX" ] 76} 77 78rmon_histogram() 79{ 80 local iface=$1; shift 81 local neigh=$1; shift 82 local set=$1; shift 83 local nbuckets=0 84 local step= 85 86 while read -r -a bucket; do 87 step="$set-pkts${bucket[0]}to${bucket[1]}" 88 89 for if in "$iface" "$neigh"; do 90 if ! ensure_mtu "$if" "${bucket[0]}"; then 91 ktap_print_msg "$if does not support the required MTU for $step" 92 ktap_test_xfail "$TEST_NAME.$step" 93 return 94 fi 95 done 96 97 if ! bucket_test "$iface" "$neigh" "$set" "$nbuckets" "${bucket[0]}"; then 98 ktap_test_fail "$TEST_NAME.$step" 99 return 1 100 fi 101 ktap_test_pass "$TEST_NAME.$step" 102 nbuckets=$((nbuckets + 1)) 103 done < <(run_on "$iface" ethtool --json -S "$iface" --groups rmon | \ 104 jq -r ".[0].rmon[\"${set}-pktsNtoM\"][]|[.low, .high]|@tsv" 2>/dev/null) 105 106 if [ "$nbuckets" -eq 0 ]; then 107 ktap_print_msg "$iface does not support $set histogram counters" 108 return 109 fi 110} 111 112rmon_rx_histogram() 113{ 114 rmon_histogram "$h1" "$h2" rx 115} 116 117rmon_tx_histogram() 118{ 119 rmon_histogram "$h1" "$h2" tx 120} 121 122setup_prepare() 123{ 124 h1=${NETIFS[p1]} 125 h2=${NETIFS[p2]} 126 127 for iface in "$h1" "$h2"; do 128 netif_mtu["$iface"]=$(run_on "$iface" \ 129 ip -j link show dev "$iface" | jq -r '.[0].mtu') 130 done 131} 132 133cleanup() 134{ 135 pre_cleanup 136 137 # Do not bring down the interfaces, just configure the initial MTU 138 for iface in "$h2" "$h1"; do 139 run_on "$iface" ip link set dev "$iface" \ 140 mtu "${netif_mtu[$iface]}" 141 done 142} 143 144check_ethtool_counter_group_support 145trap cleanup EXIT 146 147bucket_count=$(ethtool --json -S "${NETIFS[p1]}" --groups rmon | \ 148 jq -r '.[0].rmon | 149 "\((."rx-pktsNtoM" | length) + 150 (."tx-pktsNtoM" | length))"') 151ktap_print_header 152ktap_set_plan "$bucket_count" 153 154setup_prepare 155setup_wait 156 157tests_run 158 159ktap_finished 160