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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>
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Jun 10, 2019
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| #!/bin/bash | ||
| # SPDX-License-Identifier: GPL-2.0 | ||
| # | ||
| # Validate cached routes in fib{6}_nh that is used by multiple prefixes. | ||
| # Validate a different # exception is generated in h0 for each remote host. | ||
| # | ||
| # h1 | ||
| # / | ||
| # h0 - r1 - h2 | ||
| # \ | ||
| # h3 | ||
| # | ||
| # routing in h0 to hN is done with nexthop objects. | ||
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| PAUSE_ON_FAIL=no | ||
| VERBOSE=0 | ||
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| ################################################################################ | ||
| # helpers | ||
|
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| log_test() | ||
| { | ||
| local rc=$1 | ||
| local expected=$2 | ||
| local msg="$3" | ||
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| if [ ${rc} -eq ${expected} ]; then | ||
| printf "TEST: %-60s [ OK ]\n" "${msg}" | ||
| nsuccess=$((nsuccess+1)) | ||
| else | ||
| ret=1 | ||
| nfail=$((nfail+1)) | ||
| printf "TEST: %-60s [FAIL]\n" "${msg}" | ||
| if [ "${PAUSE_ON_FAIL}" = "yes" ]; then | ||
| echo | ||
| echo "hit enter to continue, 'q' to quit" | ||
| read a | ||
| [ "$a" = "q" ] && exit 1 | ||
| fi | ||
| fi | ||
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| [ "$VERBOSE" = "1" ] && echo | ||
| } | ||
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| run_cmd() | ||
| { | ||
| local cmd="$*" | ||
| local out | ||
| local rc | ||
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| if [ "$VERBOSE" = "1" ]; then | ||
| echo "COMMAND: $cmd" | ||
| fi | ||
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| out=$(eval $cmd 2>&1) | ||
| rc=$? | ||
| if [ "$VERBOSE" = "1" -a -n "$out" ]; then | ||
| echo "$out" | ||
| fi | ||
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| [ "$VERBOSE" = "1" ] && echo | ||
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| return $rc | ||
| } | ||
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| ################################################################################ | ||
| # config | ||
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| create_ns() | ||
| { | ||
| local ns=${1} | ||
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| ip netns del ${ns} 2>/dev/null | ||
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| ip netns add ${ns} | ||
| ip -netns ${ns} addr add 127.0.0.1/8 dev lo | ||
| 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 | ||
| case ${ns} in | ||
| h*) | ||
| ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=0 | ||
| ;; | ||
| r*) | ||
| ip netns exec $ns sysctl -q -w net.ipv4.ip_forward=1 | ||
| ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=1 | ||
| ;; | ||
| esac | ||
| } | ||
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| setup() | ||
| { | ||
| local ns | ||
| local i | ||
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| #set -e | ||
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| for ns in h0 r1 h1 h2 h3 | ||
| do | ||
| create_ns ${ns} | ||
| done | ||
|
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| # | ||
| # create interconnects | ||
| # | ||
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| for i in 0 1 2 3 | ||
| do | ||
| ip -netns h${i} li add eth0 type veth peer name r1h${i} | ||
| ip -netns h${i} li set eth0 up | ||
| 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${i}.1/24 | ||
| ip -netns h${i} -6 addr add dev eth0 2001:db8:10${i}::1/64 | ||
| ip -netns r1 addr add dev eth${i} 172.16.10${i}.254/24 | ||
| ip -netns r1 -6 addr add dev eth${i} 2001:db8:10${i}::64/64 | ||
| done | ||
|
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| ip -netns h0 nexthop add id 4 via 172.16.100.254 dev eth0 | ||
| ip -netns h0 nexthop add id 6 via 2001:db8:100::64 dev eth0 | ||
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| # routing from h0 to h1-h3 and back | ||
| for i in 1 2 3 | ||
| do | ||
| ip -netns h0 ro add 172.16.10${i}.0/24 nhid 4 | ||
| 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${i}::/64 nhid 6 | ||
| ip -netns h${i} -6 ro add 2001:db8:100::/64 via 2001:db8:10${i}::64 | ||
| done | ||
|
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| if [ "$VERBOSE" = "1" ]; then | ||
| echo | ||
| echo "host 1 config" | ||
| ip -netns h0 li sh | ||
| ip -netns h0 ro sh | ||
| ip -netns h0 -6 ro sh | ||
| fi | ||
|
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| #set +e | ||
| } | ||
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| cleanup() | ||
| { | ||
| for n in h1 r1 h2 h3 h4 | ||
| do | ||
| ip netns del ${n} 2>/dev/null | ||
| done | ||
| } | ||
|
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| change_mtu() | ||
| { | ||
| local hostid=$1 | ||
| local mtu=$2 | ||
|
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| run_cmd ip -netns h${hostid} li set eth0 mtu ${mtu} | ||
| run_cmd ip -netns r1 li set eth${hostid} mtu ${mtu} | ||
| } | ||
|
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| ################################################################################ | ||
| # validate exceptions | ||
|
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| validate_v4_exception() | ||
| { | ||
| local i=$1 | ||
| local mtu=$2 | ||
| local ping_sz=$3 | ||
| local dst="172.16.10${i}.1" | ||
| local h0=172.16.100.1 | ||
| local r1=172.16.100.254 | ||
| local rc | ||
|
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| if [ ${ping_sz} != "0" ]; then | ||
| run_cmd ip netns exec h0 ping -s ${ping_sz} -c5 -w5 ${dst} | ||
| fi | ||
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| if [ "$VERBOSE" = "1" ]; then | ||
| echo "Route get" | ||
| ip -netns h0 ro get ${dst} | ||
| echo "Searching for:" | ||
| echo " cache .* mtu ${mtu}" | ||
| echo | ||
| fi | ||
|
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| ip -netns h0 ro get ${dst} | \ | ||
| grep -q "cache .* mtu ${mtu}" | ||
| rc=$? | ||
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| log_test $rc 0 "IPv4: host 0 to host ${i}, mtu ${mtu}" | ||
| } | ||
|
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| validate_v6_exception() | ||
| { | ||
| local i=$1 | ||
| local mtu=$2 | ||
| local ping_sz=$3 | ||
| local dst="2001:db8:10${i}::1" | ||
| local h0=2001:db8:100::1 | ||
| local r1=2001:db8:100::64 | ||
| local rc | ||
|
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| if [ ${ping_sz} != "0" ]; then | ||
| run_cmd ip netns exec h0 ping6 -s ${ping_sz} -c5 -w5 ${dst} | ||
| fi | ||
|
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| if [ "$VERBOSE" = "1" ]; then | ||
| echo "Route get" | ||
| ip -netns h0 -6 ro get ${dst} | ||
| echo "Searching for:" | ||
| echo " ${dst} from :: via ${r1} dev eth0 src ${h0} .* mtu ${mtu}" | ||
| echo | ||
| fi | ||
|
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| ip -netns h0 -6 ro get ${dst} | \ | ||
| grep -q "${dst} from :: via ${r1} dev eth0 src ${h0} .* mtu ${mtu}" | ||
| rc=$? | ||
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| log_test $rc 0 "IPv6: host 0 to host ${i}, mtu ${mtu}" | ||
| } | ||
|
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| ################################################################################ | ||
| # main | ||
|
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| while getopts :pv o | ||
| do | ||
| case $o in | ||
| p) PAUSE_ON_FAIL=yes;; | ||
| v) VERBOSE=1;; | ||
| esac | ||
| done | ||
|
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| cleanup | ||
| setup | ||
| sleep 2 | ||
|
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| cpus=$(cat /sys/devices/system/cpu/online) | ||
| cpus="$(seq ${cpus/-/ })" | ||
| ret=0 | ||
| for i in 1 2 3 | ||
| do | ||
| # generate a cached route per-cpu | ||
| for c in ${cpus}; do | ||
| run_cmd taskset -c ${c} ip netns exec h0 ping -c1 -w1 172.16.10${i}.1 | ||
| [ $? -ne 0 ] && printf "\nERROR: ping to h${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 | ||
| [ $? -ne 0 ] && printf "\nERROR: ping6 to h${i} failed\n" && ret=1 | ||
|
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| [ $ret -ne 0 ] && break | ||
| done | ||
| [ $ret -ne 0 ] && break | ||
| done | ||
|
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| if [ $ret -eq 0 ]; then | ||
| # generate different exceptions in h0 for h1, h2 and h3 | ||
| change_mtu 1 1300 | ||
| validate_v4_exception 1 1300 1350 | ||
| validate_v6_exception 1 1300 1350 | ||
| echo | ||
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| change_mtu 2 1350 | ||
| validate_v4_exception 2 1350 1400 | ||
| validate_v6_exception 2 1350 1400 | ||
| echo | ||
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| change_mtu 3 1400 | ||
| validate_v4_exception 3 1400 1450 | ||
| validate_v6_exception 3 1400 1450 | ||
| echo | ||
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| validate_v4_exception 1 1300 0 | ||
| validate_v6_exception 1 1300 0 | ||
| echo | ||
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| validate_v4_exception 2 1350 0 | ||
| validate_v6_exception 2 1350 0 | ||
| echo | ||
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| validate_v4_exception 3 1400 0 | ||
| validate_v6_exception 3 1400 0 | ||
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| # targeted deletes to trigger cleanup paths in kernel | ||
| ip -netns h0 ro del 172.16.102.0/24 nhid 4 | ||
| ip -netns h0 -6 ro del 2001:db8:102::/64 nhid 6 | ||
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| ip -netns h0 nexthop del id 4 | ||
| ip -netns h0 nexthop del id 6 | ||
| fi | ||
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| cleanup |