1#!/bin/bash
  2# SPDX-License-Identifier: GPL-2.0
  3#
  4# Script will generate one flow per thread (-t N)
  5#  - Same destination IP
  6#  - Fake source IPs for each flow (fixed based on thread number)
  7#
  8# Useful for scale testing on receiver, to see whether silo'ing flows
  9# works and scales.  For optimal scalability (on receiver) each
 10# separate-flow should not access shared variables/data. This script
 11# helps magnify any of these scaling issues by overloading the receiver.
 12#
 13basedir=`dirname $0`
 14source ${basedir}/functions.sh
 15root_check_run_with_sudo "$@"
 16
 17# Parameter parsing via include
 18source ${basedir}/parameters.sh
 19
 20# Trap EXIT first
 21trap_exit
 22
 23# Set some default params, if they didn't get set
 24if [ -z "$DEST_IP" ]; then
 25    [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
 26fi
 27[ -z "$DST_MAC" ]   && DST_MAC="90:e2:ba:ff:ff:ff"
 28[ -z "$CLONE_SKB" ] && CLONE_SKB="0"
 29[ -z "$BURST" ]     && BURST=32
 30[ -z "$COUNT" ]     && COUNT="0" # Zero means indefinitely
 31if [ -n "$DEST_IP" ]; then
 32    validate_addr${IP6} $DEST_IP
 33    read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP)
 34fi
 35if [ -n "$DST_PORT" ]; then
 36    read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)
 37    validate_ports $UDP_DST_MIN $UDP_DST_MAX
 38fi
 39
 40# General cleanup everything since last run
 41[ -z "$APPEND" ] && pg_ctrl "reset"
 42
 43# Threads are specified with parameter -t value in $THREADS
 44for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
 45    dev=${DEV}@${thread}
 46
 47    # Add remove all other devices and add_device $dev to thread
 48    [ -z "$APPEND" ] && pg_thread $thread "rem_device_all"
 49    pg_thread $thread "add_device" $dev
 50
 51    # Base config
 52    pg_set $dev "flag QUEUE_MAP_CPU"
 53    pg_set $dev "count $COUNT"
 54    pg_set $dev "clone_skb $CLONE_SKB"
 55    pg_set $dev "pkt_size $PKT_SIZE"
 56    pg_set $dev "delay $DELAY"
 57    pg_set $dev "flag NO_TIMESTAMP"
 58
 59    # Single destination
 60    pg_set $dev "dst_mac $DST_MAC"
 61    pg_set $dev "dst${IP6}_min $DST_MIN"
 62    pg_set $dev "dst${IP6}_max $DST_MAX"
 63
 64    if [ -n "$DST_PORT" ]; then
 65	# Single destination port or random port range
 66	pg_set $dev "flag UDPDST_RND"
 67	pg_set $dev "udp_dst_min $UDP_DST_MIN"
 68	pg_set $dev "udp_dst_max $UDP_DST_MAX"
 69    fi
 70
 71    [ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM"
 72
 73    # Setup source IP-addresses based on thread number
 74    pg_set $dev "src_min 198.18.$((thread+1)).1"
 75    pg_set $dev "src_max 198.18.$((thread+1)).1"
 76
 77    # Setup burst, for easy testing -b 0 disable bursting
 78    # (internally in pktgen default and minimum burst=1)
 79    if [[ ${BURST} -ne 0 ]]; then
 80	pg_set $dev "burst $BURST"
 81    else
 82	info "$dev: Not using burst"
 83    fi
 84
 85done
 86
 87# Run if user hits control-c
 88function print_result() {
 89    # Print results
 90    for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
 91	dev=${DEV}@${thread}
 92	echo "Device: $dev"
 93	cat /proc/net/pktgen/$dev | grep -A2 "Result:"
 94    done
 95}
 96# trap keyboard interrupt (Ctrl-C)
 97trap true SIGINT
 98
 99if [ -z "$APPEND" ]; then
100    echo "Running... ctrl^C to stop" >&2
101    pg_ctrl "start"
102
103    print_result
104else
105    echo "Append mode: config done. Do more or use 'pg_ctrl start' to run"
106fi