net/hw/ethtool_rmon.sh

2 # SPDX-License-Identifier: GPL-2.0
16 declare -A netif_mtu
22 	local current=$(ip -j link show dev $iface | jq -r '.[0].mtu')
23 	local required=$((len - ETH_HLEN - ETH_FCS_LEN))
25 	if [ $current -lt $required ]; then
44 	# Mausezahn does not include FCS bytes in its length - but the
45 	# histogram counters do
46 	len=$((len - ETH_FCS_LEN))
49 	before=$(ethtool --json -S $iface --groups rmon | \
50 		jq -r ".[0].rmon[\"${set}-pktsNtoM\"][$bucket].val")
52 	# Send 10k one way and 20k in the other, to detect counters
54 	$MZ $neigh -q -c $num_rx -p $len -a own -b bcast -d 10us
55 	$MZ $iface -q -c $num_tx -p $len -a own -b bcast -d 10us
57 	after=$(ethtool --json -S $iface --groups rmon | \
58 		jq -r ".[0].rmon[\"${set}-pktsNtoM\"][$bucket].val")
60 	delta=$((after - before))
65 	[ $delta -ge $expected ] && [ $delta -le $((expected + 100)) ]
78 	while read -r -a bucket; do
79 		step="$set-pkts${bucket[0]}to${bucket[1]} on $iface"
94 	done < <(ethtool --json -S $iface --groups rmon | \
95 		jq -r ".[0].rmon[\"${set}-pktsNtoM\"][]|[.low, .high]|@tsv" 2>/dev/null)
97 	if [ $nbuckets -eq 0 ]; then
98 		log_test_xfail "$iface does not support $set histogram counters"
121 		netif_mtu[$iface]=$(ip -j link show dev $iface | jq -r '.[0].mtu')
133 			down