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# # Common functions used by pktgen scripts # - Depending on bash 3 (or higher) syntax # # Author: Jesper Dangaaard Brouer # License: GPL set -o errexit ## -- 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 local status=0 # 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" || status=$? if [[ "$proc_file" != "pgctrl" ]]; then result=$(grep "Result: OK:" $proc_ctrl) || true if [[ "$result" == "" ]]; then grep "Result:" $proc_ctrl >&2 fi 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 > $PGDEV\"" fi } function trap_exit() { # Cleanup pktgen setup on exit if thats not "append mode" if [[ -z "$APPEND" ]] && [[ $EUID -eq 0 ]]; then trap 'pg_ctrl "reset"' EXIT fi } ## -- General shell tricks -- function root_check_run_with_sudo() { # Trick so, program can be run as normal user, will just use "sudo" # call as root_check_run_as_sudo "$@" if [ "$EUID" -ne 0 ]; then if [ -x $0 ]; then # Directly executable use sudo info "Not root, running with sudo" sudo -E "$0" "$@" exit $? fi err 4 "cannot perform sudo run of $0" fi } # Exact input device's NUMA node info function get_iface_node() { local node=$(</sys/class/net/$1/device/numa_node) if [[ $node == -1 ]]; then echo 0 else echo $node fi } # Given an Dev/iface, get its queues' irq numbers function get_iface_irqs() { local IFACE=$1 local queues="${IFACE}-.*TxRx" irqs=$(grep "$queues" /proc/interrupts | cut -f1 -d:) [ -z "$irqs" ] && irqs=$(grep $IFACE /proc/interrupts | cut -f1 -d:) [ -z "$irqs" ] && irqs=$(for i in `ls -Ux /sys/class/net/$IFACE/device/msi_irqs` ;\ do grep "$i:.*TxRx" /proc/interrupts | grep -v fdir | cut -f 1 -d : ;\ done) [ -z "$irqs" ] && err 3 "Could not find interrupts for $IFACE" echo $irqs } # Given a NUMA node, return cpu ids belonging to it. function get_node_cpus() { local node=$1 local node_cpu_list local node_cpu_range_list=`cut -f1- -d, --output-delimiter=" " \ /sys/devices/system/node/node$node/cpulist` for cpu_range in $node_cpu_range_list do node_cpu_list="$node_cpu_list "`seq -s " " ${cpu_range//-/ }` done echo $node_cpu_list } # Check $1 is in between $2, $3 ($2 <= $1 <= $3) function in_between() { [[ ($1 -ge $2) && ($1 -le $3) ]] ; } # Extend shrunken IPv6 address. # fe80::42:bcff:fe84:e10a => fe80:0:0:0:42:bcff:fe84:e10a function extend_addr6() { local addr=$1 local sep=: sep2=:: local sep_cnt=$(tr -cd $sep <<< $1 | wc -c) local shrink # separator count should be (2 <= $sep_cnt <= 7) if ! (in_between $sep_cnt 2 7); then err 5 "Invalid IP6 address: $1" fi # if shrink '::' occurs multiple, it's malformed. shrink=( $(grep -E -o "$sep{2,}" <<< $addr) ) if [[ ${#shrink[@]} -ne 0 ]]; then if [[ ${#shrink[@]} -gt 1 || ( ${shrink[0]} != $sep2 ) ]]; then err 5 "Invalid IP6 address: $1" fi fi # add 0 at begin & end, and extend addr by adding :0 [[ ${addr:0:1} == $sep ]] && addr=0${addr} [[ ${addr: -1} == $sep ]] && addr=${addr}0 echo "${addr/$sep2/$(printf ':0%.s' $(seq $[8-sep_cnt])):}" } # Given a single IP(v4/v6) address, whether it is valid. function validate_addr() { # check function is called with (funcname)6 [[ ${FUNCNAME[1]: -1} == 6 ]] && local IP6=6 local bitlen=$[ IP6 ? 128 : 32 ] local len=$[ IP6 ? 8 : 4 ] local max=$[ 2**(len*2)-1 ] local net prefix local addr sep IFS='/' read net prefix <<< $1 [[ $IP6 ]] && net=$(extend_addr6 $net) # if prefix exists, check (0 <= $prefix <= $bitlen) if [[ -n $prefix ]]; then if ! (in_between $prefix 0 $bitlen); then err 5 "Invalid prefix: /$prefix" fi fi # set separator for each IP(v4/v6) [[ $IP6 ]] && sep=: || sep=. IFS=$sep read -a addr <<< $net # array length if [[ ${#addr[@]} != $len ]]; then err 5 "Invalid IP$IP6 address: $1" fi # check each digit (0 <= $digit <= $max) for digit in "${addr[@]}"; do [[ $IP6 ]] && digit=$[ 16#$digit ] if ! (in_between $digit 0 $max); then err 5 "Invalid IP$IP6 address: $1" fi done return 0 } function validate_addr6() { validate_addr $@ ; } # Given a single IP(v4/v6) or CIDR, return minimum and maximum IP addr. function parse_addr() { # check function is called with (funcname)6 [[ ${FUNCNAME[1]: -1} == 6 ]] && local IP6=6 local net prefix local min_ip max_ip IFS='/' read net prefix <<< $1 [[ $IP6 ]] && net=$(extend_addr6 $net) if [[ -z $prefix ]]; then min_ip=$net max_ip=$net else # defining array for converting Decimal 2 Binary # 00000000 00000001 00000010 00000011 00000100 ... local d2b='{0..1}{0..1}{0..1}{0..1}{0..1}{0..1}{0..1}{0..1}' [[ $IP6 ]] && d2b+=$d2b eval local D2B=($d2b) local bitlen=$[ IP6 ? 128 : 32 ] local remain=$[ bitlen-prefix ] local octet=$[ IP6 ? 16 : 8 ] local min_mask max_mask local min max local ip_bit local ip sep # set separator for each IP(v4/v6) [[ $IP6 ]] && sep=: || sep=. IFS=$sep read -ra ip <<< $net min_mask="$(printf '1%.s' $(seq $prefix))$(printf '0%.s' $(seq $remain))" max_mask="$(printf '0%.s' $(seq $prefix))$(printf '1%.s' $(seq $remain))" # calculate min/max ip with &,| operator for i in "${!ip[@]}"; do digit=$[ IP6 ? 16#${ip[$i]} : ${ip[$i]} ] ip_bit=${D2B[$digit]} idx=$[ octet*i ] min[$i]=$[ 2#$ip_bit & 2#${min_mask:$idx:$octet} ] max[$i]=$[ 2#$ip_bit | 2#${max_mask:$idx:$octet} ] [[ $IP6 ]] && { min[$i]=$(printf '%X' ${min[$i]}); max[$i]=$(printf '%X' ${max[$i]}); } done min_ip=$(IFS=$sep; echo "${min[*]}") max_ip=$(IFS=$sep; echo "${max[*]}") fi echo $min_ip $max_ip } function parse_addr6() { parse_addr $@ ; } # Given a single or range of port(s), return minimum and maximum port number. function parse_ports() { local port_str=$1 local port_list local min_port local max_port IFS="-" read -ra port_list <<< $port_str min_port=${port_list[0]} max_port=${port_list[1]:-$min_port} echo $min_port $max_port } # Given a minimum and maximum port, verify port number. function validate_ports() { local min_port=$1 local max_port=$2 # 1 <= port <= 65535 if (in_between $min_port 1 65535); then if (in_between $max_port 1 65535); then if [[ $min_port -le $max_port ]]; then return 0 fi fi fi err 5 "Invalid port(s): $min_port-$max_port" }