unicast RPF for FIB2.0 - vpp - Vector Packet Processing

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author	Neale Ranns <nranns@cisco.com>	2016-10-03 13:05:48 +0100
committer	Damjan Marion <dmarion.lists@gmail.com>	2016-10-07 21:32:24 +0000
commit	3ee44040c66cbe47ff292ac7fb0badccbe2afe6d (patch)
tree	a52a4dd0750467845f237ee5e4e88aa95ea11bab /test
parent	4a7e58bf481adb843707eec4a81213776a6d5212 (diff)

unicast RPF for FIB2.0

In a heirarchical FIB performing a unicast RPF check would require the traversal of the data-plane graph to seek out all the adjacency objects and then read those to find their interface. This is not efficient. Instead, for each path-list we construct a list of unique input interfaces and link this uRPF-list against the entry in the prefix table. In the data-plane the uRPF list can be retrieved from the load-balance lookup result and the RPF check is a simple and efficient walk across the minimal interface list. The uRPF-list is maintained as the routing heirarchy changes, in a similar way to the data-plane object graph. We also provide a knob to allow an arbitrary prefix to pass the loose check. Change-Id: Ie7c0ae3c4483ef467cfd5b136ee0315ff98ec15b Signed-off-by: Neale Ranns <nranns@cisco.com>

Diffstat (limited to 'test')

0 files changed, 0 insertions, 0 deletions

#!/bin/bash function die() { echo "ERROR: $*" >&2 exit 1 } function pci-unbind() { echo $1 | sudo tee /sys/bus/pci/devices/$1/driver/unbind > /dev/null } function pci-bind() { pci-unbind $1 echo $2 | sudo tee /sys/bus/pci/devices/$1/driver_override > /dev/null echo $1 | sudo tee /sys/bus/pci/drivers/$2/bind > /dev/null echo | sudo tee /sys/bus/pci/devices/$1/driver_override > /dev/null } function show_vfs() { path=$1 netdev=$2 printf "\nVirtual Functions:\n%-2s %-12s %-9s %-12s %-17s %s\n" \ "ID" "PCI Addr" "PCI ID" "Driver" "MAC Addr" "Config" for vf_path in ${path}/virtfn*; do vf=$(basename $(readlink ${vf_path})) vfid=$(basename ${vf_path//virtfn/}) line=$(ip link show dev ${netdev} | grep "vf ${vfid}") driver=$(basename $(readlink ${vf_path}/driver)) pciid="$(cat ${vf_path}/vendor | cut -dx -f2):$(cat ${vf_path}/device | cut -dx -f2)" mac=$(echo $line | sed -n -E -e 's/.*MAC ([0-9a-f:]+),.*/\1/p') cfg=$(echo $line | cut -d, -f2-) printf "%-2s %-12s %-9s %-12s %-17s%s\n" \ $vfid $vf $pciid $driver $mac "$cfg" done } function get_pci_addr() { local addr if [ -d /sys/class/net/$2/device ]; then addr=$(basename $(readlink /sys/class/net/${2}/device)) else addr=$2 fi if [ ! -d /sys/bus/pci/devices/${pci_addr} ]; then die "PCI device $2 doesn't exist" fi eval "$1=${addr}" } function show () { get_pci_addr pci_addr $1 path="/sys/bus/pci/devices/${pci_addr}" if [ ! -f ${path}/sriov_numvfs ]; then die "PCI device $1 is not SR-IOV device" fi printf "%-20s: %s\n" "PCI Address" ${pci_addr} printf "%-20s: %s\n" "PCI ID" \ "$(cat ${path}/vendor | cut -dx -f2):$(cat ${path}/device | cut -dx -f2)" printf "%-20s: %s\n" "Driver name" $(basename $(readlink ${path}/driver)) printf "%-20s: %s\n" "Driver Version" $(cat ${path}/driver/module/version) printf "%-20s: %s\n" "PCI Link Speed (max)" "$(cat ${path}/current_link_speed) ($(cat ${path}/max_link_speed))" printf "%-20s: %s\n" "PCI Link Width (max)" "$(cat ${path}/current_link_width) ($(cat ${path}/max_link_width))" printf "%-20s: %s\n" "NUMA Node" $(cat ${path}/numa_node) printf "%-20s: %s\n" "Number of VFs" $(cat ${path}/sriov_numvfs) printf "%-20s: %s\n" "Total VFs" $(cat ${path}/sriov_totalvfs) if [ -d ${path}/net/* ] ; then netdev=$(basename ${path}/net/*) netdev_path=${path}/net/${netdev} printf "%-20s: %s\n" "Interface" ${netdev} printf "%-20s: %s\n" "MAC Address" $(cat ${netdev_path}/address) printf "%-20s: %s\n" "Speed" $(cat ${netdev_path}/speed) printf "%-20s: %s\n" "State" $(cat ${netdev_path}/operstate) fi [ $(cat ${path}/sriov_numvfs) -gt 0 ] && show_vfs ${path} ${netdev} } function remove_all () { get_pci_addr pci_addr $1 path="/sys/bus/pci/devices/${pci_addr}" [ $(cat ${path}/sriov_numvfs) -gt 0 ] || die "No VFs configured on $1" echo 0 | sudo tee ${path}/sriov_numvfs > /dev/null echo "VFs removed..." } function create () { get_pci_addr pci_addr $1 path="/sys/bus/pci/devices/${pci_addr}" [ $(cat ${path}/sriov_numvfs) -gt 0 ] && die "VFs already configured on $1" [ "0$2" -gt 0 ] || die "Please specify number of VFs to create" echo $2 | sudo tee ${path}/sriov_numvfs > /dev/null [ -d ${path}/net/* ] || die "No net device for $1" netdev=$(basename ${path}/net/*) netdev_path=${path}/net/${netdev} mac_prefix=$(cat ${netdev_path}/address | cut -d: -f1,3,4,5,6 ) for vf_path in ${path}/virtfn*; do vf=$(basename $(readlink ${vf_path})) vfid=$(basename ${vf_path//virtfn/}) mac="${mac_prefix}:$(printf "%02x" ${vfid})" sudo ip link set dev ${netdev} vf ${vfid} mac ${mac} sudo ip link set dev ${netdev} vf ${vfid} trust on sudo ip link set dev ${netdev} vf ${vfid} spoofchk off pci-bind ${vf} vfio-pci done [ $(cat ${path}/sriov_numvfs) -gt 0 ] && show_vfs ${path} ${netdev} } function help() { cat << __EOF__ $0 show <dev> Displays information about <dev> where <dev> is PCI address or linux interface name. $0 remove-all <dev> Remove all virtual functions from device <dev>. $0 create <dev> <num> Create <num> virtual functions on device<dev>. __EOF__ } case $1 in show) show $2 ;; create) create $2 $3 ;; remove-all) remove_all $2 ;; help) help $2 ;; *) echo "Please specify command (show, create, remove-all)" help ;; esac


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