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Message-Id: <20190801185648.27653-4-dsahern@kernel.org>
Date: Thu, 1 Aug 2019 11:56:36 -0700
From: David Ahern <dsahern@...nel.org>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, David Ahern <dsahern@...il.com>
Subject: [PATCH net-next 03/15] selftests: Add ipv4 ping tests to fcnal-test
From: David Ahern <dsahern@...il.com>
Add ping tests to fcnal-test.sh. Covers the permutations of directly
connected addresses, routed destinations, VRF and non-VRF, and expected
failures.
Setup includes unreachable routes and fib rules blocking traffic.
Signed-off-by: David Ahern <dsahern@...il.com>
---
tools/testing/selftests/net/fcnal-test.sh | 268 +++++++++++++++++++++++++++++-
1 file changed, 267 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/net/fcnal-test.sh b/tools/testing/selftests/net/fcnal-test.sh
index 22cfbd2fd09c..3f6e786b34ae 100755
--- a/tools/testing/selftests/net/fcnal-test.sh
+++ b/tools/testing/selftests/net/fcnal-test.sh
@@ -448,6 +448,270 @@ setup()
}
################################################################################
+# IPv4
+
+ipv4_ping_novrf()
+{
+ local a
+
+ #
+ # out
+ #
+ for a in ${NSB_IP} ${NSB_LO_IP}
+ do
+ log_start
+ run_cmd ping -c1 -w1 ${a}
+ log_test_addr ${a} $? 0 "ping out"
+
+ log_start
+ run_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}
+ log_test_addr ${a} $? 0 "ping out, device bind"
+
+ log_start
+ run_cmd ping -c1 -w1 -I ${NSA_LO_IP} ${a}
+ log_test_addr ${a} $? 0 "ping out, address bind"
+ done
+
+ #
+ # in
+ #
+ for a in ${NSA_IP} ${NSA_LO_IP}
+ do
+ log_start
+ run_cmd_nsb ping -c1 -w1 ${a}
+ log_test_addr ${a} $? 0 "ping in"
+ done
+
+ #
+ # local traffic
+ #
+ for a in ${NSA_IP} ${NSA_LO_IP} 127.0.0.1
+ do
+ log_start
+ run_cmd ping -c1 -w1 ${a}
+ log_test_addr ${a} $? 0 "ping local"
+ done
+
+ #
+ # local traffic, socket bound to device
+ #
+ # address on device
+ a=${NSA_IP}
+ log_start
+ run_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}
+ log_test_addr ${a} $? 0 "ping local, device bind"
+
+ # loopback addresses not reachable from device bind
+ # fails in a really weird way though because ipv4 special cases
+ # route lookups with oif set.
+ for a in ${NSA_LO_IP} 127.0.0.1
+ do
+ log_start
+ show_hint "Fails since address on loopback device is out of device scope"
+ run_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}
+ log_test_addr ${a} $? 1 "ping local, device bind"
+ done
+
+ #
+ # ip rule blocks reachability to remote address
+ #
+ log_start
+ setup_cmd ip rule add pref 32765 from all lookup local
+ setup_cmd ip rule del pref 0 from all lookup local
+ setup_cmd ip rule add pref 50 to ${NSB_LO_IP} prohibit
+ setup_cmd ip rule add pref 51 from ${NSB_IP} prohibit
+
+ a=${NSB_LO_IP}
+ run_cmd ping -c1 -w1 ${a}
+ log_test_addr ${a} $? 2 "ping out, blocked by rule"
+
+ # NOTE: ipv4 actually allows the lookup to fail and yet still create
+ # a viable rtable if the oif (e.g., bind to device) is set, so this
+ # case succeeds despite the rule
+ # run_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}
+
+ a=${NSA_LO_IP}
+ log_start
+ show_hint "Response generates ICMP (or arp request is ignored) due to ip rule"
+ run_cmd_nsb ping -c1 -w1 ${a}
+ log_test_addr ${a} $? 1 "ping in, blocked by rule"
+
+ [ "$VERBOSE" = "1" ] && echo
+ setup_cmd ip rule del pref 32765 from all lookup local
+ setup_cmd ip rule add pref 0 from all lookup local
+ setup_cmd ip rule del pref 50 to ${NSB_LO_IP} prohibit
+ setup_cmd ip rule del pref 51 from ${NSB_IP} prohibit
+
+ #
+ # route blocks reachability to remote address
+ #
+ log_start
+ setup_cmd ip route replace unreachable ${NSB_LO_IP}
+ setup_cmd ip route replace unreachable ${NSB_IP}
+
+ a=${NSB_LO_IP}
+ run_cmd ping -c1 -w1 ${a}
+ log_test_addr ${a} $? 2 "ping out, blocked by route"
+
+ # NOTE: ipv4 actually allows the lookup to fail and yet still create
+ # a viable rtable if the oif (e.g., bind to device) is set, so this
+ # case succeeds despite not having a route for the address
+ # run_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}
+
+ a=${NSA_LO_IP}
+ log_start
+ show_hint "Response is dropped (or arp request is ignored) due to ip route"
+ run_cmd_nsb ping -c1 -w1 ${a}
+ log_test_addr ${a} $? 1 "ping in, blocked by route"
+
+ #
+ # remove 'remote' routes; fallback to default
+ #
+ log_start
+ setup_cmd ip ro del ${NSB_LO_IP}
+
+ a=${NSB_LO_IP}
+ run_cmd ping -c1 -w1 ${a}
+ log_test_addr ${a} $? 2 "ping out, unreachable default route"
+
+ # NOTE: ipv4 actually allows the lookup to fail and yet still create
+ # a viable rtable if the oif (e.g., bind to device) is set, so this
+ # case succeeds despite not having a route for the address
+ # run_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}
+}
+
+ipv4_ping_vrf()
+{
+ local a
+
+ # should default on; does not exist on older kernels
+ set_sysctl net.ipv4.raw_l3mdev_accept=1 2>/dev/null
+
+ #
+ # out
+ #
+ for a in ${NSB_IP} ${NSB_LO_IP}
+ do
+ log_start
+ run_cmd ping -c1 -w1 -I ${VRF} ${a}
+ log_test_addr ${a} $? 0 "ping out, VRF bind"
+
+ log_start
+ run_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}
+ log_test_addr ${a} $? 0 "ping out, device bind"
+
+ log_start
+ run_cmd ip vrf exec ${VRF} ping -c1 -w1 -I ${NSA_IP} ${a}
+ log_test_addr ${a} $? 0 "ping out, vrf device + dev address bind"
+
+ log_start
+ run_cmd ip vrf exec ${VRF} ping -c1 -w1 -I ${VRF_IP} ${a}
+ log_test_addr ${a} $? 0 "ping out, vrf device + vrf address bind"
+ done
+
+ #
+ # in
+ #
+ for a in ${NSA_IP} ${VRF_IP}
+ do
+ log_start
+ run_cmd_nsb ping -c1 -w1 ${a}
+ log_test_addr ${a} $? 0 "ping in"
+ done
+
+ #
+ # local traffic, local address
+ #
+ for a in ${NSA_IP} ${VRF_IP} 127.0.0.1
+ do
+ log_start
+ show_hint "Source address should be ${a}"
+ run_cmd ping -c1 -w1 -I ${VRF} ${a}
+ log_test_addr ${a} $? 0 "ping local, VRF bind"
+ done
+
+ #
+ # local traffic, socket bound to device
+ #
+ # address on device
+ a=${NSA_IP}
+ log_start
+ run_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}
+ log_test_addr ${a} $? 0 "ping local, device bind"
+
+ # vrf device is out of scope
+ for a in ${VRF_IP} 127.0.0.1
+ do
+ log_start
+ show_hint "Fails since address on vrf device is out of device scope"
+ run_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}
+ log_test_addr ${a} $? 1 "ping local, device bind"
+ done
+
+ #
+ # ip rule blocks address
+ #
+ log_start
+ setup_cmd ip rule add pref 50 to ${NSB_LO_IP} prohibit
+ setup_cmd ip rule add pref 51 from ${NSB_IP} prohibit
+
+ a=${NSB_LO_IP}
+ run_cmd ping -c1 -w1 -I ${VRF} ${a}
+ log_test_addr ${a} $? 2 "ping out, vrf bind, blocked by rule"
+
+ log_start
+ run_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}
+ log_test_addr ${a} $? 2 "ping out, device bind, blocked by rule"
+
+ a=${NSA_LO_IP}
+ log_start
+ show_hint "Response lost due to ip rule"
+ run_cmd_nsb ping -c1 -w1 ${a}
+ log_test_addr ${a} $? 1 "ping in, blocked by rule"
+
+ [ "$VERBOSE" = "1" ] && echo
+ setup_cmd ip rule del pref 50 to ${NSB_LO_IP} prohibit
+ setup_cmd ip rule del pref 51 from ${NSB_IP} prohibit
+
+ #
+ # remove 'remote' routes; fallback to default
+ #
+ log_start
+ setup_cmd ip ro del vrf ${VRF} ${NSB_LO_IP}
+
+ a=${NSB_LO_IP}
+ run_cmd ping -c1 -w1 -I ${VRF} ${a}
+ log_test_addr ${a} $? 2 "ping out, vrf bind, unreachable route"
+
+ log_start
+ run_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}
+ log_test_addr ${a} $? 2 "ping out, device bind, unreachable route"
+
+ a=${NSA_LO_IP}
+ log_start
+ show_hint "Response lost by unreachable route"
+ run_cmd_nsb ping -c1 -w1 ${a}
+ log_test_addr ${a} $? 1 "ping in, unreachable route"
+}
+
+ipv4_ping()
+{
+ log_section "IPv4 ping"
+
+ log_subsection "No VRF"
+ setup
+ set_sysctl net.ipv4.raw_l3mdev_accept=0 2>/dev/null
+ ipv4_ping_novrf
+ setup
+ set_sysctl net.ipv4.raw_l3mdev_accept=1 2>/dev/null
+ ipv4_ping_novrf
+
+ log_subsection "With VRF"
+ setup "yes"
+ ipv4_ping_vrf
+}
+
+################################################################################
# usage
usage()
@@ -467,7 +731,7 @@ EOF
################################################################################
# main
-TESTS_IPV4=""
+TESTS_IPV4="ipv4_ping"
TESTS_IPV6=""
PAUSE_ON_FAIL=no
PAUSE=no
@@ -506,6 +770,8 @@ declare -i nsuccess=0
for t in $TESTS
do
case $t in
+ ipv4_ping|ping) ipv4_ping;;
+
# setup namespaces and config, but do not run any tests
setup) setup; exit 0;;
vrf_setup) setup "yes"; exit 0;;
--
2.11.0
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