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| -rw-r--r-- | samples/pktgen/README.rst | 43 | ||||
| -rw-r--r-- | samples/pktgen/functions.sh | 121 | ||||
| -rw-r--r-- | samples/pktgen/parameters.sh | 97 |
3 files changed, 261 insertions, 0 deletions
diff --git a/samples/pktgen/README.rst b/samples/pktgen/README.rst new file mode 100644 index 000000000000..8365c4e5c513 --- /dev/null +++ b/samples/pktgen/README.rst @@ -0,0 +1,43 @@ +Sample and benchmark scripts for pktgen (packet generator) +========================================================== +This directory contains some pktgen sample and benchmark scripts, that +can easily be copied and adjusted for your own use-case. + +General doc is located in kernel: Documentation/networking/pktgen.txt + +Helper include files +==================== +This directory contains two helper shell files, that can be "included" +by shell source'ing. Namely "functions.sh" and "parameters.sh". + +Common parameters +----------------- +The parameters.sh file support easy and consistant parameter parsing +across the sample scripts. Usage example is printed on errors:: + + Usage: ./pktgen_sample01_simple.sh [-vx] -i ethX + -i : ($DEV) output interface/device (required) + -s : ($PKT_SIZE) packet size + -d : ($DEST_IP) destination IP + -m : ($DST_MAC) destination MAC-addr + -t : ($THREADS) threads to start + -c : ($SKB_CLONE) SKB clones send before alloc new SKB + -b : ($BURST) HW level bursting of SKBs + -v : ($VERBOSE) verbose + -x : ($DEBUG) debug + +The global variable being set is also listed. E.g. the required +interface/device parameter "-i" sets variable $DEV. + +Common functions +---------------- +The functions.sh file provides; Three different shell functions for +configuring the different components of pktgen: pg_ctrl(), pg_thread() +and pg_set(). + +These functions correspond to pktgens different components. + * pg_ctrl() control "pgctrl" (/proc/net/pktgen/pgctrl) + * pg_thread() control the kernel threads and binding to devices + * pg_set() control setup of individual devices + +See sample scripts for usage examples. diff --git a/samples/pktgen/functions.sh b/samples/pktgen/functions.sh new file mode 100644 index 000000000000..205e4cde4601 --- /dev/null +++ b/samples/pktgen/functions.sh @@ -0,0 +1,121 @@ +# +# Common functions used by pktgen scripts +# - Depending on bash 3 (or higher) syntax +# +# Author: Jesper Dangaaard Brouer +# License: GPL + +## -- General shell logging cmds -- +function err() { + local exitcode=$1 + shift + echo "ERROR: $@" >&2 + exit $exitcode +} + +function warn() { + echo "WARN : $@" >&2 +} + +function info() { + if [[ -n "$VERBOSE" ]]; then + echo "INFO : $@" >&2 + fi +} + +## -- Pktgen proc config commands -- ## +export PROC_DIR=/proc/net/pktgen +# +# Three different shell functions for configuring the different +# components of pktgen: +# pg_ctrl(), pg_thread() and pg_set(). +# +# These functions correspond to pktgens different components. +# * pg_ctrl() control "pgctrl" (/proc/net/pktgen/pgctrl) +# * pg_thread() control the kernel threads and binding to devices +# * pg_set() control setup of individual devices +function pg_ctrl() { + local proc_file="pgctrl" + proc_cmd ${proc_file} "$@" +} + +function pg_thread() { + local thread=$1 + local proc_file="kpktgend_${thread}" + shift + proc_cmd ${proc_file} "$@" +} + +function pg_set() { + local dev=$1 + local proc_file="$dev" + shift + proc_cmd ${proc_file} "$@" +} + +# More generic replacement for pgset(), that does not depend on global +# variable for proc file. +function proc_cmd() { + local result + local proc_file=$1 + # after shift, the remaining args are contained in $@ + shift + local proc_ctrl=${PROC_DIR}/$proc_file + if [[ ! -e "$proc_ctrl" ]]; then + err 3 "proc file:$proc_ctrl does not exists (dev added to thread?)" + else + if [[ ! -w "$proc_ctrl" ]]; then + err 4 "proc file:$proc_ctrl not writable, not root?!" + fi + fi + + if [[ "$DEBUG" == "yes" ]]; then + echo "cmd: $@ > $proc_ctrl" + fi + # Quoting of "$@" is important for space expansion + echo "$@" > "$proc_ctrl" + local status=$? + + result=$(grep "Result: OK:" $proc_ctrl) + # Due to pgctrl, cannot use exit code $? from grep + if [[ "$result" == "" ]]; then + grep "Result:" $proc_ctrl >&2 + fi + if (( $status != 0 )); then + err 5 "Write error($status) occurred cmd: \"$@ > $proc_ctrl\"" + fi +} + +# Old obsolete "pgset" function, with slightly improved err handling +function pgset() { + local result + + if [[ "$DEBUG" == "yes" ]]; then + echo "cmd: $1 > $PGDEV" + fi + echo $1 > $PGDEV + local status=$? + + result=`cat $PGDEV | fgrep "Result: OK:"` + if [[ "$result" == "" ]]; then + cat $PGDEV | fgrep Result: + fi + if (( $status != 0 )); then + err 5 "Write error($status) occurred cmd: \"$1 > $PGDEV\"" + fi +} + +## -- General shell tricks -- + +function root_check_run_with_sudo() { + # Trick so, program can be run as normal user, will just use "sudo" + # call as root_check_run_as_sudo "$@" + if [ "$EUID" -ne 0 ]; then + if [ -x $0 ]; then # Directly executable use sudo + info "Not root, running with sudo" + sudo "$0" "$@" + exit $? + fi + err 4 "cannot perform sudo run of $0" + fi +} diff --git a/samples/pktgen/parameters.sh b/samples/pktgen/parameters.sh new file mode 100644 index 000000000000..33b70fdd5a4a --- /dev/null +++ b/samples/pktgen/parameters.sh @@ -0,0 +1,97 @@ +# +# Common parameter parsing for pktgen scripts +# + +function usage() { + echo "" + echo "Usage: $0 [-vx] -i ethX" + echo " -i : (\$DEV) output interface/device (required)" + echo " -s : (\$PKT_SIZE) packet size" + echo " -d : (\$DEST_IP) destination IP" + echo " -m : (\$DST_MAC) destination MAC-addr" + echo " -t : (\$THREADS) threads to start" + echo " -c : (\$SKB_CLONE) SKB clones send before alloc new SKB" + echo " -b : (\$BURST) HW level bursting of SKBs" + echo " -v : (\$VERBOSE) verbose" + echo " -x : (\$DEBUG) debug" + echo "" +} + +## --- Parse command line arguments / parameters --- +## echo "Commandline options:" +while getopts "s:i:d:m:t:c:b:vxh" option; do + case $option in + i) # interface + export DEV=$OPTARG + info "Output device set to: DEV=$DEV" + ;; + s) + export PKT_SIZE=$OPTARG + info "Packet size set to: PKT_SIZE=$PKT_SIZE bytes" + ;; + d) # destination IP + export DEST_IP=$OPTARG + info "Destination IP set to: DEST_IP=$DEST_IP" + ;; + m) # MAC + export DST_MAC=$OPTARG + info "Destination MAC set to: DST_MAC=$DST_MAC" + ;; + t) + export THREADS=$OPTARG + export CPU_THREADS=$OPTARG + let "CPU_THREADS -= 1" + info "Number of threads to start: $THREADS (0 to $CPU_THREADS)" + ;; + c) + export CLONE_SKB=$OPTARG + info "CLONE_SKB=$CLONE_SKB" + ;; + b) + export BURST=$OPTARG + info "SKB bursting: BURST=$BURST" + ;; + v) + export VERBOSE=yes + info "Verbose mode: VERBOSE=$VERBOSE" + ;; + x) + export DEBUG=yes + info "Debug mode: DEBUG=$DEBUG" + ;; + h|?|*) + usage; + err 2 "[ERROR] Unknown parameters!!!" + esac +done +shift $(( $OPTIND - 1 )) + +if [ -z "$PKT_SIZE" ]; then + # NIC adds 4 bytes CRC + export PKT_SIZE=60 + info "Default packet size set to: set to: $PKT_SIZE bytes" +fi + +if [ -z "$THREADS" ]; then + # Zero CPU threads means one thread, because CPU numbers are zero indexed + export CPU_THREADS=0 + export THREADS=1 +fi + +if [ -z "$DEV" ]; then + usage + err 2 "Please specify output device" +fi + +if [ -z "$DST_MAC" ]; then + warn "Missing destination MAC address" +fi + +if [ -z "$DEST_IP" ]; then + warn "Missing destination IP address" +fi + +if [ ! -d /proc/net/pktgen ]; then + info "Loading kernel module: pktgen" + modprobe pktgen +fi |