Add a selftest for PRP that performs a basic ping test on IPv4 and IPv6,
over the plain PRP interface and a VLAN interface, similar to the existing
ping test for HSR. The test first checks reachability of the other node,
then checks for no loss and no duplicates.

Signed-off-by: Felix Maurer <fmaurer@redhat.com>
---
 tools/testing/selftests/net/hsr/Makefile    |   1 +
 tools/testing/selftests/net/hsr/prp_ping.sh | 147 ++++++++++++++++++++
 2 files changed, 148 insertions(+)
 create mode 100755 tools/testing/selftests/net/hsr/prp_ping.sh

diff --git a/tools/testing/selftests/net/hsr/Makefile b/tools/testing/selftests/net/hsr/Makefile
index 4b6afc0fe9f8..1886f345897a 100644
--- a/tools/testing/selftests/net/hsr/Makefile
+++ b/tools/testing/selftests/net/hsr/Makefile
@@ -5,6 +5,7 @@ top_srcdir = ../../../../..
 TEST_PROGS := \
 	hsr_ping.sh \
 	hsr_redbox.sh \
+	prp_ping.sh \
 # end of TEST_PROGS
 
 TEST_FILES += hsr_common.sh
diff --git a/tools/testing/selftests/net/hsr/prp_ping.sh b/tools/testing/selftests/net/hsr/prp_ping.sh
new file mode 100755
index 000000000000..fd2ba9f05d4c
--- /dev/null
+++ b/tools/testing/selftests/net/hsr/prp_ping.sh
@@ -0,0 +1,147 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+ipv6=true
+
+source ./hsr_common.sh
+
+optstring="h4"
+usage() {
+	echo "Usage: $0 [OPTION]"
+	echo -e "\t-4: IPv4 only: disable IPv6 tests (default: test both IPv4 and IPv6)"
+}
+
+while getopts "$optstring" option;do
+	case "$option" in
+	"h")
+		usage "$0"
+		exit 0
+		;;
+	"4")
+		ipv6=false
+		;;
+	"?")
+		usage "$0"
+		exit 1
+		;;
+esac
+done
+
+setup_prp_interfaces()
+{
+	echo "INFO: Preparing interfaces for PRP"
+# Two PRP nodes, connected by two links (treated as LAN A and LAN B).
+#
+#       vethA ----- vethA
+#     prp1             prp2
+#       vethB ----- vethB
+#
+#     node1           node2
+
+	# Interfaces
+	# shellcheck disable=SC2154 # variables assigned by setup_ns
+	ip link add vethA netns "$node1" type veth peer name vethA netns "$node2"
+	ip link add vethB netns "$node1" type veth peer name vethB netns "$node2"
+
+	# MAC addresses will be copied from LAN A interface
+	ip -net "$node1" link set address 00:11:22:00:00:01 dev vethA
+	ip -net "$node2" link set address 00:11:22:00:00:02 dev vethA
+
+	# PRP
+	ip -net "$node1" link add name prp1 type hsr \
+		slave1 vethA slave2 vethB supervision 45 proto 1
+	ip -net "$node2" link add name prp2 type hsr \
+		slave1 vethA slave2 vethB supervision 45 proto 1
+
+	# IP addresses
+	ip -net "$node1" addr add 100.64.0.1/24 dev prp1
+	ip -net "$node1" addr add dead:beef:0::1/64 dev prp1 nodad
+	ip -net "$node2" addr add 100.64.0.2/24 dev prp2
+	ip -net "$node2" addr add dead:beef:0::2/64 dev prp2 nodad
+
+	# All links up
+	ip -net "$node1" link set vethA up
+	ip -net "$node1" link set vethB up
+	ip -net "$node1" link set prp1 up
+
+	ip -net "$node2" link set vethA up
+	ip -net "$node2" link set vethB up
+	ip -net "$node2" link set prp2 up
+}
+
+setup_vlan_interfaces()
+{
+	# Interfaces
+	ip -net "$node1" link add link prp1 name prp1.2 type vlan id 2
+	ip -net "$node2" link add link prp2 name prp2.2 type vlan id 2
+
+	# IP addresses
+	ip -net "$node1" addr add 100.64.2.1/24 dev prp1.2
+	ip -net "$node1" addr add dead:beef:2::1/64 dev prp1.2 nodad
+
+	ip -net "$node2" addr add 100.64.2.2/24 dev prp2.2
+	ip -net "$node2" addr add dead:beef:2::2/64 dev prp2.2 nodad
+
+	# All links up
+	ip -net "$node1" link set prp1.2 up
+	ip -net "$node2" link set prp2.2 up
+}
+
+do_ping_tests()
+{
+	local netid="$1"
+
+	echo "INFO: Initial validation ping"
+
+	do_ping "$node1" "100.64.$netid.2"
+	do_ping "$node2" "100.64.$netid.1"
+	stop_if_error "Initial validation failed on IPv4"
+
+	do_ping "$node1" "dead:beef:$netid::2"
+	do_ping "$node2" "dead:beef:$netid::1"
+	stop_if_error "Initial validation failed on IPv6"
+
+	echo "INFO: Longer ping test."
+
+	do_ping_long "$node1" "100.64.$netid.2"
+	do_ping_long "$node2" "100.64.$netid.1"
+	stop_if_error "Longer ping test failed on IPv4."
+
+	do_ping_long "$node1" "dead:beef:$netid::2"
+	do_ping_long "$node2" "dead:beef:$netid::1"
+	stop_if_error "Longer ping test failed on IPv6."
+}
+
+run_ping_tests()
+{
+	echo "INFO: Running ping tests"
+	do_ping_tests 0
+}
+
+run_vlan_ping_tests()
+{
+	vlan_challenged_prp1=$(ip net exec "$node1" ethtool -k prp1 | \
+		grep "vlan-challenged" | awk '{print $2}')
+	vlan_challenged_prp2=$(ip net exec "$node2" ethtool -k prp2 | \
+		grep "vlan-challenged" | awk '{print $2}')
+
+	if [[ "$vlan_challenged_prp1" = "off" || \
+	      "$vlan_challenged_prp2" = "off" ]]; then
+		echo "INFO: Running VLAN ping tests"
+		setup_vlan_interfaces
+		do_ping_tests 2
+	else
+		echo "INFO: Not Running VLAN tests as the device does not support VLAN"
+	fi
+}
+
+check_prerequisites
+trap cleanup_all_ns EXIT
+
+setup_ns node1 node2
+setup_prp_interfaces
+
+run_ping_tests
+run_vlan_ping_tests
+
+exit $ret
-- 
2.52.0