340 lines
8.6 KiB
Bash
340 lines
8.6 KiB
Bash
#
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# Common functions used by pktgen scripts
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# - Depending on bash 3 (or higher) syntax
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#
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# Author: Jesper Dangaaard Brouer
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# License: GPL
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set -o errexit
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## -- General shell logging cmds --
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function err() {
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local exitcode=$1
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shift
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echo "ERROR: $@" >&2
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exit $exitcode
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}
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function warn() {
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echo "WARN : $@" >&2
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}
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function info() {
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if [[ -n "$VERBOSE" ]]; then
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echo "INFO : $@" >&2
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fi
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}
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## -- Pktgen proc config commands -- ##
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export PROC_DIR=/proc/net/pktgen
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#
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# Three different shell functions for configuring the different
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# components of pktgen:
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# pg_ctrl(), pg_thread() and pg_set().
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#
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# These functions correspond to pktgens different components.
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# * pg_ctrl() control "pgctrl" (/proc/net/pktgen/pgctrl)
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# * pg_thread() control the kernel threads and binding to devices
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# * pg_set() control setup of individual devices
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function pg_ctrl() {
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local proc_file="pgctrl"
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proc_cmd ${proc_file} "$@"
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}
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function pg_thread() {
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local thread=$1
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local proc_file="kpktgend_${thread}"
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shift
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proc_cmd ${proc_file} "$@"
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}
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function pg_set() {
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local dev=$1
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local proc_file="$dev"
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shift
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proc_cmd ${proc_file} "$@"
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}
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# More generic replacement for pgset(), that does not depend on global
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# variable for proc file.
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function proc_cmd() {
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local result
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local proc_file=$1
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local status=0
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# after shift, the remaining args are contained in $@
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shift
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local proc_ctrl=${PROC_DIR}/$proc_file
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if [[ ! -e "$proc_ctrl" ]]; then
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err 3 "proc file:$proc_ctrl does not exists (dev added to thread?)"
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else
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if [[ ! -w "$proc_ctrl" ]]; then
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err 4 "proc file:$proc_ctrl not writable, not root?!"
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fi
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fi
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if [[ "$DEBUG" == "yes" ]]; then
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echo "cmd: $@ > $proc_ctrl"
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fi
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# Quoting of "$@" is important for space expansion
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echo "$@" > "$proc_ctrl" || status=$?
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if [[ "$proc_file" != "pgctrl" ]]; then
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result=$(grep "Result: OK:" $proc_ctrl) || true
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if [[ "$result" == "" ]]; then
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grep "Result:" $proc_ctrl >&2
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fi
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fi
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if (( $status != 0 )); then
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err 5 "Write error($status) occurred cmd: \"$@ > $proc_ctrl\""
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fi
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}
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# Old obsolete "pgset" function, with slightly improved err handling
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function pgset() {
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local result
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if [[ "$DEBUG" == "yes" ]]; then
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echo "cmd: $1 > $PGDEV"
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fi
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echo $1 > $PGDEV
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local status=$?
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result=`cat $PGDEV | fgrep "Result: OK:"`
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if [[ "$result" == "" ]]; then
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cat $PGDEV | fgrep Result:
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fi
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if (( $status != 0 )); then
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err 5 "Write error($status) occurred cmd: \"$1 > $PGDEV\""
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fi
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}
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if [[ -z "$APPEND" ]]; then
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if [[ $EUID -eq 0 ]]; then
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# Cleanup pktgen setup on exit if thats not "append mode"
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trap 'pg_ctrl "reset"' EXIT
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fi
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fi
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## -- General shell tricks --
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function root_check_run_with_sudo() {
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# Trick so, program can be run as normal user, will just use "sudo"
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# call as root_check_run_as_sudo "$@"
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if [ "$EUID" -ne 0 ]; then
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if [ -x $0 ]; then # Directly executable use sudo
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info "Not root, running with sudo"
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sudo -E "$0" "$@"
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exit $?
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fi
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err 4 "cannot perform sudo run of $0"
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fi
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}
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# Exact input device's NUMA node info
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function get_iface_node()
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{
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local node=$(</sys/class/net/$1/device/numa_node)
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if [[ $node == -1 ]]; then
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echo 0
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else
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echo $node
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fi
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}
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# Given an Dev/iface, get its queues' irq numbers
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function get_iface_irqs()
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{
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local IFACE=$1
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local queues="${IFACE}-.*TxRx"
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irqs=$(grep "$queues" /proc/interrupts | cut -f1 -d:)
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[ -z "$irqs" ] && irqs=$(grep $IFACE /proc/interrupts | cut -f1 -d:)
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[ -z "$irqs" ] && irqs=$(for i in `ls -Ux /sys/class/net/$IFACE/device/msi_irqs` ;\
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do grep "$i:.*TxRx" /proc/interrupts | grep -v fdir | cut -f 1 -d : ;\
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done)
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[ -z "$irqs" ] && err 3 "Could not find interrupts for $IFACE"
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echo $irqs
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}
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# Given a NUMA node, return cpu ids belonging to it.
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function get_node_cpus()
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{
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local node=$1
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local node_cpu_list
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local node_cpu_range_list=`cut -f1- -d, --output-delimiter=" " \
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/sys/devices/system/node/node$node/cpulist`
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for cpu_range in $node_cpu_range_list
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do
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node_cpu_list="$node_cpu_list "`seq -s " " ${cpu_range//-/ }`
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done
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echo $node_cpu_list
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}
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# Check $1 is in between $2, $3 ($2 <= $1 <= $3)
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function in_between() { [[ ($1 -ge $2) && ($1 -le $3) ]] ; }
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# Extend shrunken IPv6 address.
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# fe80::42:bcff:fe84:e10a => fe80:0:0:0:42:bcff:fe84:e10a
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function extend_addr6()
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{
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local addr=$1
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local sep=: sep2=::
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local sep_cnt=$(tr -cd $sep <<< $1 | wc -c)
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local shrink
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# separator count should be (2 <= $sep_cnt <= 7)
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if ! (in_between $sep_cnt 2 7); then
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err 5 "Invalid IP6 address: $1"
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fi
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# if shrink '::' occurs multiple, it's malformed.
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shrink=( $(grep -E -o "$sep{2,}" <<< $addr) )
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if [[ ${#shrink[@]} -ne 0 ]]; then
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if [[ ${#shrink[@]} -gt 1 || ( ${shrink[0]} != $sep2 ) ]]; then
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err 5 "Invalid IP6 address: $1"
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fi
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fi
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# add 0 at begin & end, and extend addr by adding :0
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[[ ${addr:0:1} == $sep ]] && addr=0${addr}
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[[ ${addr: -1} == $sep ]] && addr=${addr}0
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echo "${addr/$sep2/$(printf ':0%.s' $(seq $[8-sep_cnt])):}"
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}
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# Given a single IP(v4/v6) address, whether it is valid.
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function validate_addr()
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{
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# check function is called with (funcname)6
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[[ ${FUNCNAME[1]: -1} == 6 ]] && local IP6=6
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local bitlen=$[ IP6 ? 128 : 32 ]
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local len=$[ IP6 ? 8 : 4 ]
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local max=$[ 2**(len*2)-1 ]
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local net prefix
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local addr sep
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IFS='/' read net prefix <<< $1
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[[ $IP6 ]] && net=$(extend_addr6 $net)
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# if prefix exists, check (0 <= $prefix <= $bitlen)
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if [[ -n $prefix ]]; then
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if ! (in_between $prefix 0 $bitlen); then
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err 5 "Invalid prefix: /$prefix"
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fi
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fi
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# set separator for each IP(v4/v6)
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[[ $IP6 ]] && sep=: || sep=.
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IFS=$sep read -a addr <<< $net
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# array length
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if [[ ${#addr[@]} != $len ]]; then
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err 5 "Invalid IP$IP6 address: $1"
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fi
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# check each digit (0 <= $digit <= $max)
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for digit in "${addr[@]}"; do
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[[ $IP6 ]] && digit=$[ 16#$digit ]
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if ! (in_between $digit 0 $max); then
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err 5 "Invalid IP$IP6 address: $1"
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fi
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done
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return 0
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}
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function validate_addr6() { validate_addr $@ ; }
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# Given a single IP(v4/v6) or CIDR, return minimum and maximum IP addr.
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function parse_addr()
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{
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# check function is called with (funcname)6
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[[ ${FUNCNAME[1]: -1} == 6 ]] && local IP6=6
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local net prefix
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local min_ip max_ip
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IFS='/' read net prefix <<< $1
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[[ $IP6 ]] && net=$(extend_addr6 $net)
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if [[ -z $prefix ]]; then
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min_ip=$net
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max_ip=$net
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else
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# defining array for converting Decimal 2 Binary
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# 00000000 00000001 00000010 00000011 00000100 ...
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local d2b='{0..1}{0..1}{0..1}{0..1}{0..1}{0..1}{0..1}{0..1}'
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[[ $IP6 ]] && d2b+=$d2b
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eval local D2B=($d2b)
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local bitlen=$[ IP6 ? 128 : 32 ]
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local remain=$[ bitlen-prefix ]
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local octet=$[ IP6 ? 16 : 8 ]
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local min_mask max_mask
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local min max
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local ip_bit
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local ip sep
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# set separator for each IP(v4/v6)
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[[ $IP6 ]] && sep=: || sep=.
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IFS=$sep read -ra ip <<< $net
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min_mask="$(printf '1%.s' $(seq $prefix))$(printf '0%.s' $(seq $remain))"
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max_mask="$(printf '0%.s' $(seq $prefix))$(printf '1%.s' $(seq $remain))"
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# calculate min/max ip with &,| operator
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for i in "${!ip[@]}"; do
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digit=$[ IP6 ? 16#${ip[$i]} : ${ip[$i]} ]
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ip_bit=${D2B[$digit]}
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idx=$[ octet*i ]
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min[$i]=$[ 2#$ip_bit & 2#${min_mask:$idx:$octet} ]
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max[$i]=$[ 2#$ip_bit | 2#${max_mask:$idx:$octet} ]
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[[ $IP6 ]] && { min[$i]=$(printf '%X' ${min[$i]});
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max[$i]=$(printf '%X' ${max[$i]}); }
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done
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min_ip=$(IFS=$sep; echo "${min[*]}")
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max_ip=$(IFS=$sep; echo "${max[*]}")
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fi
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echo $min_ip $max_ip
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}
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function parse_addr6() { parse_addr $@ ; }
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# Given a single or range of port(s), return minimum and maximum port number.
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function parse_ports()
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{
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local port_str=$1
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local port_list
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local min_port
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local max_port
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IFS="-" read -ra port_list <<< $port_str
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min_port=${port_list[0]}
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max_port=${port_list[1]:-$min_port}
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echo $min_port $max_port
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}
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# Given a minimum and maximum port, verify port number.
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function validate_ports()
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{
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local min_port=$1
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local max_port=$2
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# 1 <= port <= 65535
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if (in_between $min_port 1 65535); then
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if (in_between $max_port 1 65535); then
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if [[ $min_port -le $max_port ]]; then
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return 0
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fi
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fi
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fi
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err 5 "Invalid port(s): $min_port-$max_port"
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}
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