--- /dev/null
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+source lib.sh
+TESTS="
+ extern_valid_ipv4
+ extern_valid_ipv6
+"
+VERBOSE=0
+
+################################################################################
+# Utilities
+
+run_cmd()
+{
+ local cmd="$1"
+ local out
+ local stderr="2>/dev/null"
+
+ if [ "$VERBOSE" = "1" ]; then
+ echo "COMMAND: $cmd"
+ stderr=
+ fi
+
+ out=$(eval "$cmd" "$stderr")
+ rc=$?
+ if [ "$VERBOSE" -eq 1 ] && [ -n "$out" ]; then
+ echo " $out"
+ fi
+
+ return $rc
+}
+
+################################################################################
+# Setup
+
+setup()
+{
+ set -e
+
+ setup_ns ns1 ns2
+
+ ip -n "$ns1" link add veth0 type veth peer name veth1 netns "$ns2"
+ ip -n "$ns1" link set dev veth0 up
+ ip -n "$ns2" link set dev veth1 up
+
+ ip -n "$ns1" address add 192.0.2.1/24 dev veth0
+ ip -n "$ns1" address add 2001:db8:1::1/64 dev veth0 nodad
+ ip -n "$ns2" address add 192.0.2.2/24 dev veth1
+ ip -n "$ns2" address add 2001:db8:1::2/64 dev veth1 nodad
+
+ ip netns exec "$ns1" sysctl -qw net.ipv6.conf.all.keep_addr_on_down=1
+ ip netns exec "$ns2" sysctl -qw net.ipv6.conf.all.keep_addr_on_down=1
+
+ sleep 5
+
+ set +e
+}
+
+exit_cleanup_all()
+{
+ cleanup_all_ns
+ exit "${EXIT_STATUS}"
+}
+
+################################################################################
+# Tests
+
+extern_valid_common()
+{
+ local af_str=$1; shift
+ local ip_addr=$1; shift
+ local tbl_name=$1; shift
+ local subnet=$1; shift
+ local mac
+
+ mac=$(ip -n "$ns2" -j link show dev veth1 | jq -r '.[]["address"]')
+
+ RET=0
+
+ # Check that simple addition works.
+ run_cmd "ip -n $ns1 neigh add $ip_addr lladdr $mac nud stale dev veth0 extern_valid"
+ run_cmd "ip -n $ns1 neigh get $ip_addr dev veth0 | grep \"extern_valid\""
+ check_err $? "No \"extern_valid\" flag after addition"
+
+ log_test "$af_str \"extern_valid\" flag: Add entry"
+
+ RET=0
+
+ # Check that an entry cannot be added with "extern_valid" flag and an
+ # invalid state.
+ run_cmd "ip -n $ns1 neigh flush dev veth0"
+ run_cmd "ip -n $ns1 neigh add $ip_addr nud none dev veth0 extern_valid"
+ check_fail $? "Managed to add an entry with \"extern_valid\" flag and an invalid state"
+
+ log_test "$af_str \"extern_valid\" flag: Add with an invalid state"
+
+ RET=0
+
+ # Check that entry cannot be added with both "extern_valid" flag and
+ # "use" / "managed" flag.
+ run_cmd "ip -n $ns1 neigh flush dev veth0"
+ run_cmd "ip -n $ns1 neigh add $ip_addr lladdr $mac nud stale dev veth0 extern_valid use"
+ check_fail $? "Managed to add an entry with \"extern_valid\" flag and \"use\" flag"
+
+ log_test "$af_str \"extern_valid\" flag: Add with \"use\" flag"
+
+ RET=0
+
+ # Check that "extern_valid" flag can be toggled using replace.
+ run_cmd "ip -n $ns1 neigh flush dev veth0"
+ run_cmd "ip -n $ns1 neigh add $ip_addr lladdr $mac nud stale dev veth0"
+ run_cmd "ip -n $ns1 neigh replace $ip_addr lladdr $mac nud stale dev veth0 extern_valid"
+ run_cmd "ip -n $ns1 neigh get $ip_addr dev veth0 | grep \"extern_valid\""
+ check_err $? "Did not manage to set \"extern_valid\" flag with replace"
+ run_cmd "ip -n $ns1 neigh replace $ip_addr lladdr $mac nud stale dev veth0"
+ run_cmd "ip -n $ns1 neigh get $ip_addr dev veth0 | grep \"extern_valid\""
+ check_fail $? "Did not manage to clear \"extern_valid\" flag with replace"
+
+ log_test "$af_str \"extern_valid\" flag: Replace entry"
+
+ RET=0
+
+ # Check that an existing "extern_valid" entry can be marked as
+ # "managed".
+ run_cmd "ip -n $ns1 neigh flush dev veth0"
+ run_cmd "ip -n $ns1 neigh add $ip_addr lladdr $mac nud stale dev veth0 extern_valid"
+ run_cmd "ip -n $ns1 neigh replace $ip_addr lladdr $mac nud stale dev veth0 extern_valid managed"
+ check_err $? "Did not manage to add \"managed\" flag to an existing \"extern_valid\" entry"
+
+ log_test "$af_str \"extern_valid\" flag: Replace entry with \"managed\" flag"
+
+ RET=0
+
+ # Check that entry cannot be replaced with "extern_valid" flag and an
+ # invalid state.
+ run_cmd "ip -n $ns1 neigh flush dev veth0"
+ run_cmd "ip -n $ns1 neigh add $ip_addr lladdr $mac nud stale dev veth0 extern_valid"
+ run_cmd "ip -n $ns1 neigh replace $ip_addr nud none dev veth0 extern_valid"
+ check_fail $? "Managed to replace an entry with \"extern_valid\" flag and an invalid state"
+
+ log_test "$af_str \"extern_valid\" flag: Replace with an invalid state"
+
+ RET=0
+
+ # Check that an "extern_valid" entry is flushed when the interface is
+ # put administratively down.
+ run_cmd "ip -n $ns1 neigh flush dev veth0"
+ run_cmd "ip -n $ns1 neigh add $ip_addr lladdr $mac nud stale dev veth0 extern_valid"
+ run_cmd "ip -n $ns1 link set dev veth0 down"
+ run_cmd "ip -n $ns1 link set dev veth0 up"
+ run_cmd "ip -n $ns1 neigh get $ip_addr dev veth0"
+ check_fail $? "\"extern_valid\" entry not flushed upon interface down"
+
+ log_test "$af_str \"extern_valid\" flag: Interface down"
+
+ RET=0
+
+ # Check that an "extern_valid" entry is not flushed when the interface
+ # loses its carrier.
+ run_cmd "ip -n $ns1 neigh flush dev veth0"
+ run_cmd "ip -n $ns1 neigh add $ip_addr lladdr $mac nud stale dev veth0 extern_valid"
+ run_cmd "ip -n $ns2 link set dev veth1 down"
+ run_cmd "ip -n $ns2 link set dev veth1 up"
+ run_cmd "sleep 2"
+ run_cmd "ip -n $ns1 neigh get $ip_addr dev veth0"
+ check_err $? "\"extern_valid\" entry flushed upon carrier down"
+
+ log_test "$af_str \"extern_valid\" flag: Carrier down"
+
+ RET=0
+
+ # Check that when entry transitions to "reachable" state it maintains
+ # the "extern_valid" flag. Wait "delay_probe" seconds for ARP request /
+ # NS to be sent.
+ local delay_probe
+
+ delay_probe=$(ip -n "$ns1" -j ntable show dev veth0 name "$tbl_name" | jq '.[]["delay_probe"]')
+ run_cmd "ip -n $ns1 neigh flush dev veth0"
+ run_cmd "ip -n $ns1 neigh add $ip_addr lladdr $mac nud stale dev veth0 extern_valid"
+ run_cmd "ip -n $ns1 neigh replace $ip_addr lladdr $mac nud stale dev veth0 extern_valid use"
+ run_cmd "sleep $((delay_probe / 1000 + 2))"
+ run_cmd "ip -n $ns1 neigh get $ip_addr dev veth0 | grep \"REACHABLE\""
+ check_err $? "Entry did not transition to \"reachable\" state"
+ run_cmd "ip -n $ns1 neigh get $ip_addr dev veth0 | grep \"extern_valid\""
+ check_err $? "Entry did not maintain \"extern_valid\" flag after transition to \"reachable\" state"
+
+ log_test "$af_str \"extern_valid\" flag: Transition to \"reachable\" state"
+
+ RET=0
+
+ # Drop all packets, trigger resolution and check that entry goes back
+ # to "stale" state instead of "failed".
+ local mcast_reprobes
+ local retrans_time
+ local ucast_probes
+ local app_probes
+ local probes
+ local delay
+
+ run_cmd "ip -n $ns1 neigh flush dev veth0"
+ run_cmd "tc -n $ns2 qdisc add dev veth1 clsact"
+ run_cmd "tc -n $ns2 filter add dev veth1 ingress proto all matchall action drop"
+ run_cmd "ip -n $ns1 neigh add $ip_addr lladdr $mac nud stale dev veth0 extern_valid"
+ run_cmd "ip -n $ns1 neigh replace $ip_addr lladdr $mac nud stale dev veth0 extern_valid use"
+ retrans_time=$(ip -n "$ns1" -j ntable show dev veth0 name "$tbl_name" | jq '.[]["retrans"]')
+ ucast_probes=$(ip -n "$ns1" -j ntable show dev veth0 name "$tbl_name" | jq '.[]["ucast_probes"]')
+ app_probes=$(ip -n "$ns1" -j ntable show dev veth0 name "$tbl_name" | jq '.[]["app_probes"]')
+ mcast_reprobes=$(ip -n "$ns1" -j ntable show dev veth0 name "$tbl_name" | jq '.[]["mcast_reprobes"]')
+ delay=$((delay_probe + (ucast_probes + app_probes + mcast_reprobes) * retrans_time))
+ run_cmd "sleep $((delay / 1000 + 2))"
+ run_cmd "ip -n $ns1 neigh get $ip_addr dev veth0 | grep \"STALE\""
+ check_err $? "Entry did not return to \"stale\" state"
+ run_cmd "ip -n $ns1 neigh get $ip_addr dev veth0 | grep \"extern_valid\""
+ check_err $? "Entry did not maintain \"extern_valid\" flag after returning to \"stale\" state"
+ probes=$(ip -n "$ns1" -j -s neigh get "$ip_addr" dev veth0 | jq '.[]["probes"]')
+ if [[ $probes -eq 0 ]]; then
+ check_err 1 "No probes were sent"
+ fi
+
+ log_test "$af_str \"extern_valid\" flag: Transition back to \"stale\" state"
+
+ run_cmd "tc -n $ns2 qdisc del dev veth1 clsact"
+
+ RET=0
+
+ # Forced garbage collection runs whenever the number of entries is
+ # larger than "thresh3" and deletes stale entries that have not been
+ # updated in the last 5 seconds.
+ #
+ # Check that an "extern_valid" entry survives a forced garbage
+ # collection. Add an entry, wait 5 seconds and add more entries than
+ # "thresh3" so that forced garbage collection will run.
+ #
+ # Note that the garbage collection thresholds are global resources and
+ # that changes in the initial namespace affect all the namespaces.
+ local forced_gc_runs_t0
+ local forced_gc_runs_t1
+ local orig_thresh1
+ local orig_thresh2
+ local orig_thresh3
+
+ run_cmd "ip -n $ns1 neigh flush dev veth0"
+ orig_thresh1=$(ip -j ntable show name "$tbl_name" | jq '.[] | select(has("thresh1")) | .["thresh1"]')
+ orig_thresh2=$(ip -j ntable show name "$tbl_name" | jq '.[] | select(has("thresh2")) | .["thresh2"]')
+ orig_thresh3=$(ip -j ntable show name "$tbl_name" | jq '.[] | select(has("thresh3")) | .["thresh3"]')
+ run_cmd "ip ntable change name $tbl_name thresh3 10 thresh2 9 thresh1 8"
+ run_cmd "ip -n $ns1 neigh add $ip_addr lladdr $mac nud stale dev veth0 extern_valid"
+ run_cmd "ip -n $ns1 neigh add ${subnet}3 lladdr $mac nud stale dev veth0"
+ run_cmd "sleep 5"
+ forced_gc_runs_t0=$(ip -j -s ntable show name "$tbl_name" | jq '.[] | select(has("forced_gc_runs")) | .["forced_gc_runs"]')
+ for i in {1..20}; do
+ run_cmd "ip -n $ns1 neigh add ${subnet}$((i + 4)) nud none dev veth0"
+ done
+ forced_gc_runs_t1=$(ip -j -s ntable show name "$tbl_name" | jq '.[] | select(has("forced_gc_runs")) | .["forced_gc_runs"]')
+ if [[ $forced_gc_runs_t1 -eq $forced_gc_runs_t0 ]]; then
+ check_err 1 "Forced garbage collection did not run"
+ fi
+ run_cmd "ip -n $ns1 neigh get $ip_addr dev veth0 | grep \"extern_valid\""
+ check_err $? "Entry with \"extern_valid\" flag did not survive forced garbage collection"
+ run_cmd "ip -n $ns1 neigh get ${subnet}3 dev veth0"
+ check_fail $? "Entry without \"extern_valid\" flag survived forced garbage collection"
+
+ log_test "$af_str \"extern_valid\" flag: Forced garbage collection"
+
+ run_cmd "ip ntable change name $tbl_name thresh3 $orig_thresh3 thresh2 $orig_thresh2 thresh1 $orig_thresh1"
+
+ RET=0
+
+ # Periodic garbage collection runs every "base_reachable"/2 seconds and
+ # if the number of entries is larger than "thresh1", then it deletes
+ # stale entries that have not been used in the last "gc_stale" seconds.
+ #
+ # Check that an "extern_valid" entry survives a periodic garbage
+ # collection. Add an "extern_valid" entry, add more than "thresh1"
+ # regular entries, wait "base_reachable" (longer than "gc_stale")
+ # seconds and check that the "extern_valid" entry was not deleted.
+ #
+ # Note that the garbage collection thresholds and "base_reachable" are
+ # global resources and that changes in the initial namespace affect all
+ # the namespaces.
+ local periodic_gc_runs_t0
+ local periodic_gc_runs_t1
+ local orig_base_reachable
+ local orig_gc_stale
+
+ run_cmd "ip -n $ns1 neigh flush dev veth0"
+ orig_thresh1=$(ip -j ntable show name "$tbl_name" | jq '.[] | select(has("thresh1")) | .["thresh1"]')
+ orig_base_reachable=$(ip -j ntable show name "$tbl_name" | jq '.[] | select(has("thresh1")) | .["base_reachable"]')
+ run_cmd "ip ntable change name $tbl_name thresh1 10 base_reachable 10000"
+ orig_gc_stale=$(ip -n "$ns1" -j ntable show name "$tbl_name" dev veth0 | jq '.[]["gc_stale"]')
+ run_cmd "ip -n $ns1 ntable change name $tbl_name dev veth0 gc_stale 5000"
+ # Wait orig_base_reachable/2 for the new interval to take effect.
+ run_cmd "sleep $(((orig_base_reachable / 1000) / 2 + 2))"
+ run_cmd "ip -n $ns1 neigh add $ip_addr lladdr $mac nud stale dev veth0 extern_valid"
+ run_cmd "ip -n $ns1 neigh add ${subnet}3 lladdr $mac nud stale dev veth0"
+ for i in {1..20}; do
+ run_cmd "ip -n $ns1 neigh add ${subnet}$((i + 4)) nud none dev veth0"
+ done
+ periodic_gc_runs_t0=$(ip -j -s ntable show name "$tbl_name" | jq '.[] | select(has("periodic_gc_runs")) | .["periodic_gc_runs"]')
+ run_cmd "sleep 10"
+ periodic_gc_runs_t1=$(ip -j -s ntable show name "$tbl_name" | jq '.[] | select(has("periodic_gc_runs")) | .["periodic_gc_runs"]')
+ [[ $periodic_gc_runs_t1 -ne $periodic_gc_runs_t0 ]]
+ check_err $? "Periodic garbage collection did not run"
+ run_cmd "ip -n $ns1 neigh get $ip_addr dev veth0 | grep \"extern_valid\""
+ check_err $? "Entry with \"extern_valid\" flag did not survive periodic garbage collection"
+ run_cmd "ip -n $ns1 neigh get ${subnet}3 dev veth0"
+ check_fail $? "Entry without \"extern_valid\" flag survived periodic garbage collection"
+
+ log_test "$af_str \"extern_valid\" flag: Periodic garbage collection"
+
+ run_cmd "ip -n $ns1 ntable change name $tbl_name dev veth0 gc_stale $orig_gc_stale"
+ run_cmd "ip ntable change name $tbl_name thresh1 $orig_thresh1 base_reachable $orig_base_reachable"
+}
+
+extern_valid_ipv4()
+{
+ extern_valid_common "IPv4" 192.0.2.2 "arp_cache" 192.0.2.
+}
+
+extern_valid_ipv6()
+{
+ extern_valid_common "IPv6" 2001:db8:1::2 "ndisc_cache" 2001:db8:1::
+}
+
+################################################################################
+# Usage
+
+usage()
+{
+ cat <<EOF
+usage: ${0##*/} OPTS
+
+ -t <test> Test(s) to run (default: all)
+ (options: $TESTS)
+ -p Pause on fail
+ -v Verbose mode (show commands and output)
+EOF
+}
+
+################################################################################
+# Main
+
+while getopts ":t:pvh" opt; do
+ case $opt in
+ t) TESTS=$OPTARG;;
+ p) PAUSE_ON_FAIL=yes;;
+ v) VERBOSE=$((VERBOSE + 1));;
+ h) usage; exit 0;;
+ *) usage; exit 1;;
+ esac
+done
+
+require_command jq
+
+if ! ip neigh help 2>&1 | grep -q "extern_valid"; then
+ echo "SKIP: iproute2 ip too old, missing \"extern_valid\" support"
+ exit "$ksft_skip"
+fi
+
+trap exit_cleanup_all EXIT
+
+for t in $TESTS
+do
+ setup; $t; cleanup_all_ns;
+done
projects / thirdparty / linux.git / commitdiff
