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selftests: net: add arp_ndisc_evict_nocarrier
This tests the sysctl options for ARP/ND: /net/ipv4/conf/<iface>/arp_evict_nocarrier /net/ipv4/conf/all/arp_evict_nocarrier /net/ipv6/conf/<iface>/ndisc_evict_nocarrier /net/ipv6/conf/all/ndisc_evict_nocarrier Signed-off-by: James Prestwood <prestwoj@gmail.com> Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
James Prestwood
Jakub Kicinski
parent
18ac597af2
commit
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1 changed files with 220 additions and 0 deletions
220
tools/testing/selftests/net/arp_ndisc_evict_nocarrier.sh
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tools/testing/selftests/net/arp_ndisc_evict_nocarrier.sh
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# Tests sysctl options {arp,ndisc}_evict_nocarrier={0,1}
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#
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# Create a veth pair and set IPs/routes on both. Then ping to establish
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# an entry in the ARP/ND table. Depending on the test set sysctl option to
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# 1 or 0. Set remote veth down which will cause local veth to go into a no
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# carrier state. Depending on the test check the ARP/ND table:
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#
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# {arp,ndisc}_evict_nocarrier=1 should contain no ARP/ND after no carrier
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# {arp,ndisc}_evict_nocarrer=0 should still contain the single ARP/ND entry
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#
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readonly PEER_NS="ns-peer-$(mktemp -u XXXXXX)"
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readonly V4_ADDR0=10.0.10.1
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readonly V4_ADDR1=10.0.10.2
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readonly V6_ADDR0=2001:db8:91::1
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readonly V6_ADDR1=2001:db8:91::2
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nsid=100
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cleanup_v6()
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{
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ip netns del me
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ip netns del peer
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sysctl -w net.ipv4.conf.veth0.ndisc_evict_nocarrier=1 >/dev/null 2>&1
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sysctl -w net.ipv4.conf.all.ndisc_evict_nocarrier=1 >/dev/null 2>&1
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}
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create_ns()
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{
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local n=${1}
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ip netns del ${n} 2>/dev/null
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ip netns add ${n}
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ip netns set ${n} $((nsid++))
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ip -netns ${n} link set lo up
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}
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setup_v6() {
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create_ns me
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create_ns peer
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IP="ip -netns me"
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$IP li add veth1 type veth peer name veth2
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$IP li set veth1 up
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$IP -6 addr add $V6_ADDR0/64 dev veth1 nodad
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$IP li set veth2 netns peer up
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ip -netns peer -6 addr add $V6_ADDR1/64 dev veth2 nodad
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ip netns exec me sysctl -w $1 >/dev/null 2>&1
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# Establish an ND cache entry
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ip netns exec me ping -6 -c1 -Iveth1 $V6_ADDR1 >/dev/null 2>&1
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# Should have the veth1 entry in ND table
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ip netns exec me ip -6 neigh get $V6_ADDR1 dev veth1 >/dev/null 2>&1
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if [ $? -ne 0 ]; then
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cleanup_v6
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echo "failed"
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exit
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fi
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# Set veth2 down, which will put veth1 in NOCARRIER state
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ip netns exec peer ip link set veth2 down
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}
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setup_v4() {
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ip netns add "${PEER_NS}"
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ip link add name veth0 type veth peer name veth1
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ip link set dev veth0 up
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ip link set dev veth1 netns "${PEER_NS}"
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ip netns exec "${PEER_NS}" ip link set dev veth1 up
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ip addr add $V4_ADDR0/24 dev veth0
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ip netns exec "${PEER_NS}" ip addr add $V4_ADDR1/24 dev veth1
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ip netns exec ${PEER_NS} ip route add default via $V4_ADDR1 dev veth1
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ip route add default via $V4_ADDR0 dev veth0
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sysctl -w "$1" >/dev/null 2>&1
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# Establish an ARP cache entry
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ping -c1 -I veth0 $V4_ADDR1 -q >/dev/null 2>&1
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# Should have the veth1 entry in ARP table
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ip neigh get $V4_ADDR1 dev veth0 >/dev/null 2>&1
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if [ $? -ne 0 ]; then
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cleanup_v4
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echo "failed"
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exit
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fi
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# Set veth1 down, which will put veth0 in NOCARRIER state
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ip netns exec "${PEER_NS}" ip link set veth1 down
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}
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cleanup_v4() {
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ip neigh flush dev veth0
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ip link del veth0
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local -r ns="$(ip netns list|grep $PEER_NS)"
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[ -n "$ns" ] && ip netns del $ns 2>/dev/null
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sysctl -w net.ipv4.conf.veth0.arp_evict_nocarrier=1 >/dev/null 2>&1
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sysctl -w net.ipv4.conf.all.arp_evict_nocarrier=1 >/dev/null 2>&1
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}
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# Run test when arp_evict_nocarrier = 1 (default).
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run_arp_evict_nocarrier_enabled() {
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echo "run arp_evict_nocarrier=1 test"
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setup_v4 "net.ipv4.conf.veth0.arp_evict_nocarrier=1"
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# ARP table should be empty
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ip neigh get $V4_ADDR1 dev veth0 >/dev/null 2>&1
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if [ $? -eq 0 ];then
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echo "failed"
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else
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echo "ok"
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fi
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cleanup_v4
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}
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# Run test when arp_evict_nocarrier = 0
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run_arp_evict_nocarrier_disabled() {
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echo "run arp_evict_nocarrier=0 test"
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setup_v4 "net.ipv4.conf.veth0.arp_evict_nocarrier=0"
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# ARP table should still contain the entry
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ip neigh get $V4_ADDR1 dev veth0 >/dev/null 2>&1
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if [ $? -eq 0 ];then
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echo "ok"
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else
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echo "failed"
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fi
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cleanup_v4
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}
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run_arp_evict_nocarrier_disabled_all() {
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echo "run all.arp_evict_nocarrier=0 test"
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setup_v4 "net.ipv4.conf.all.arp_evict_nocarrier=0"
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# ARP table should still contain the entry
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ip neigh get $V4_ADDR1 dev veth0 >/dev/null 2>&1
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if [ $? -eq 0 ];then
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echo "ok"
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else
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echo "failed"
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fi
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cleanup_v4
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}
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run_ndisc_evict_nocarrier_enabled() {
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echo "run ndisc_evict_nocarrier=1 test"
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setup_v6 "net.ipv6.conf.veth1.ndisc_evict_nocarrier=1"
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ip netns exec me ip -6 neigh get $V6_ADDR1 dev veth1 >/dev/null 2>&1
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if [ $? -eq 0 ];then
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echo "failed"
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else
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echo "ok"
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fi
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cleanup_v6
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}
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run_ndisc_evict_nocarrier_disabled() {
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echo "run ndisc_evict_nocarrier=0 test"
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setup_v6 "net.ipv6.conf.veth1.ndisc_evict_nocarrier=0"
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ip netns exec me ip -6 neigh get $V6_ADDR1 dev veth1 >/dev/null 2>&1
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if [ $? -eq 0 ];then
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echo "ok"
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else
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echo "failed"
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fi
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cleanup_v6
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}
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run_ndisc_evict_nocarrier_disabled_all() {
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echo "run all.ndisc_evict_nocarrier=0 test"
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setup_v6 "net.ipv6.conf.all.ndisc_evict_nocarrier=0"
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ip netns exec me ip -6 neigh get $V6_ADDR1 dev veth1 >/dev/null 2>&1
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if [ $? -eq 0 ];then
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echo "ok"
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else
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echo "failed"
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fi
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cleanup_v6
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}
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run_all_tests() {
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run_arp_evict_nocarrier_enabled
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run_arp_evict_nocarrier_disabled
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run_arp_evict_nocarrier_disabled_all
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run_ndisc_evict_nocarrier_enabled
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run_ndisc_evict_nocarrier_disabled
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run_ndisc_evict_nocarrier_disabled_all
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}
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if [ "$(id -u)" -ne 0 ];then
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echo "SKIP: Need root privileges"
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exit $ksft_skip;
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fi
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run_all_tests
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