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selftests: Add test with multiple prefixes using single nexthop
Add tests where multiple FIB entries use the same nexthop object. Generate per-cpu cached routes for each by running ping on each cpu, and then generate exceptions unique to each prefix (remote host) with different mtus. Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern
David S. Miller
parent
622946d918
commit
735ab2f65d
290
tools/testing/selftests/net/fib_nexthop_multiprefix.sh
Executable file
290
tools/testing/selftests/net/fib_nexthop_multiprefix.sh
Executable file
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# Validate cached routes in fib{6}_nh that is used by multiple prefixes.
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# Validate a different # exception is generated in h0 for each remote host.
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#
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# h1
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# /
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# h0 - r1 - h2
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# \
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# h3
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#
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# routing in h0 to hN is done with nexthop objects.
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PAUSE_ON_FAIL=no
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VERBOSE=0
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################################################################################
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# helpers
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log_test()
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{
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local rc=$1
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local expected=$2
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local msg="$3"
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if [ ${rc} -eq ${expected} ]; then
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printf "TEST: %-60s [ OK ]\n" "${msg}"
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nsuccess=$((nsuccess+1))
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else
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ret=1
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nfail=$((nfail+1))
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printf "TEST: %-60s [FAIL]\n" "${msg}"
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if [ "${PAUSE_ON_FAIL}" = "yes" ]; then
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echo
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echo "hit enter to continue, 'q' to quit"
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read a
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[ "$a" = "q" ] && exit 1
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fi
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fi
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[ "$VERBOSE" = "1" ] && echo
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}
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run_cmd()
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{
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local cmd="$*"
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local out
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local rc
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if [ "$VERBOSE" = "1" ]; then
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echo "COMMAND: $cmd"
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fi
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out=$(eval $cmd 2>&1)
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rc=$?
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if [ "$VERBOSE" = "1" -a -n "$out" ]; then
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echo "$out"
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fi
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[ "$VERBOSE" = "1" ] && echo
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return $rc
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}
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################################################################################
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# config
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create_ns()
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{
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local ns=${1}
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ip netns del ${ns} 2>/dev/null
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ip netns add ${ns}
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ip -netns ${ns} addr add 127.0.0.1/8 dev lo
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ip -netns ${ns} link set lo up
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ip netns exec ${ns} sysctl -q -w net.ipv6.conf.all.keep_addr_on_down=1
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case ${ns} in
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h*)
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ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=0
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;;
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r*)
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ip netns exec $ns sysctl -q -w net.ipv4.ip_forward=1
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ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=1
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;;
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esac
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}
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setup()
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{
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local ns
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local i
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#set -e
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for ns in h0 r1 h1 h2 h3
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do
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create_ns ${ns}
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done
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#
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# create interconnects
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#
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for i in 0 1 2 3
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do
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ip -netns h${i} li add eth0 type veth peer name r1h${i}
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ip -netns h${i} li set eth0 up
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ip -netns h${i} li set r1h${i} netns r1 name eth${i} up
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ip -netns h${i} addr add dev eth0 172.16.10${i}.1/24
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ip -netns h${i} -6 addr add dev eth0 2001:db8:10${i}::1/64
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ip -netns r1 addr add dev eth${i} 172.16.10${i}.254/24
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ip -netns r1 -6 addr add dev eth${i} 2001:db8:10${i}::64/64
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done
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ip -netns h0 nexthop add id 4 via 172.16.100.254 dev eth0
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ip -netns h0 nexthop add id 6 via 2001:db8:100::64 dev eth0
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# routing from h0 to h1-h3 and back
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for i in 1 2 3
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do
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ip -netns h0 ro add 172.16.10${i}.0/24 nhid 4
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ip -netns h${i} ro add 172.16.100.0/24 via 172.16.10${i}.254
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ip -netns h0 -6 ro add 2001:db8:10${i}::/64 nhid 6
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ip -netns h${i} -6 ro add 2001:db8:100::/64 via 2001:db8:10${i}::64
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done
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if [ "$VERBOSE" = "1" ]; then
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echo
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echo "host 1 config"
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ip -netns h0 li sh
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ip -netns h0 ro sh
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ip -netns h0 -6 ro sh
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fi
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#set +e
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}
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cleanup()
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{
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for n in h1 r1 h2 h3 h4
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do
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ip netns del ${n} 2>/dev/null
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done
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}
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change_mtu()
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{
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local hostid=$1
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local mtu=$2
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run_cmd ip -netns h${hostid} li set eth0 mtu ${mtu}
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run_cmd ip -netns r1 li set eth${hostid} mtu ${mtu}
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}
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################################################################################
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# validate exceptions
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validate_v4_exception()
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{
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local i=$1
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local mtu=$2
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local ping_sz=$3
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local dst="172.16.10${i}.1"
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local h0=172.16.100.1
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local r1=172.16.100.254
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local rc
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if [ ${ping_sz} != "0" ]; then
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run_cmd ip netns exec h0 ping -s ${ping_sz} -c5 -w5 ${dst}
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fi
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if [ "$VERBOSE" = "1" ]; then
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echo "Route get"
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ip -netns h0 ro get ${dst}
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echo "Searching for:"
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echo " cache .* mtu ${mtu}"
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echo
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fi
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ip -netns h0 ro get ${dst} | \
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grep -q "cache .* mtu ${mtu}"
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rc=$?
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log_test $rc 0 "IPv4: host 0 to host ${i}, mtu ${mtu}"
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}
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validate_v6_exception()
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{
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local i=$1
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local mtu=$2
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local ping_sz=$3
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local dst="2001:db8:10${i}::1"
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local h0=2001:db8:100::1
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local r1=2001:db8:100::64
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local rc
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if [ ${ping_sz} != "0" ]; then
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run_cmd ip netns exec h0 ping6 -s ${ping_sz} -c5 -w5 ${dst}
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fi
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if [ "$VERBOSE" = "1" ]; then
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echo "Route get"
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ip -netns h0 -6 ro get ${dst}
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echo "Searching for:"
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echo " ${dst} from :: via ${r1} dev eth0 src ${h0} .* mtu ${mtu}"
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echo
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fi
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ip -netns h0 -6 ro get ${dst} | \
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grep -q "${dst} from :: via ${r1} dev eth0 src ${h0} .* mtu ${mtu}"
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rc=$?
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log_test $rc 0 "IPv6: host 0 to host ${i}, mtu ${mtu}"
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}
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################################################################################
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# main
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while getopts :pv o
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do
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case $o in
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p) PAUSE_ON_FAIL=yes;;
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v) VERBOSE=1;;
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esac
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done
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cleanup
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setup
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sleep 2
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cpus=$(cat /sys/devices/system/cpu/online)
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cpus="$(seq ${cpus/-/ })"
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ret=0
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for i in 1 2 3
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do
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# generate a cached route per-cpu
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for c in ${cpus}; do
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run_cmd taskset -c ${c} ip netns exec h0 ping -c1 -w1 172.16.10${i}.1
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[ $? -ne 0 ] && printf "\nERROR: ping to h${i} failed\n" && ret=1
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run_cmd taskset -c ${c} ip netns exec h0 ping6 -c1 -w1 2001:db8:10${i}::1
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[ $? -ne 0 ] && printf "\nERROR: ping6 to h${i} failed\n" && ret=1
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[ $ret -ne 0 ] && break
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done
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[ $ret -ne 0 ] && break
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done
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if [ $ret -eq 0 ]; then
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# generate different exceptions in h0 for h1, h2 and h3
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change_mtu 1 1300
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validate_v4_exception 1 1300 1350
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validate_v6_exception 1 1300 1350
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echo
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change_mtu 2 1350
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validate_v4_exception 2 1350 1400
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validate_v6_exception 2 1350 1400
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echo
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change_mtu 3 1400
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validate_v4_exception 3 1400 1450
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validate_v6_exception 3 1400 1450
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echo
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validate_v4_exception 1 1300 0
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validate_v6_exception 1 1300 0
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echo
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validate_v4_exception 2 1350 0
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validate_v6_exception 2 1350 0
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echo
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validate_v4_exception 3 1400 0
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validate_v6_exception 3 1400 0
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# targeted deletes to trigger cleanup paths in kernel
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ip -netns h0 ro del 172.16.102.0/24 nhid 4
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ip -netns h0 -6 ro del 2001:db8:102::/64 nhid 6
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ip -netns h0 nexthop del id 4
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ip -netns h0 nexthop del id 6
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fi
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cleanup
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