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-rwxr-xr-xtools/testing/selftests/net/hsr/link_faults.sh378
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diff --git a/tools/testing/selftests/net/hsr/link_faults.sh b/tools/testing/selftests/net/hsr/link_faults.sh
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+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# shellcheck disable=SC2329
+
+source ../lib.sh
+
+ALL_TESTS="
+ test_clean_hsrv0
+ test_cut_link_hsrv0
+ test_packet_loss_hsrv0
+ test_high_packet_loss_hsrv0
+ test_reordering_hsrv0
+
+ test_clean_hsrv1
+ test_cut_link_hsrv1
+ test_packet_loss_hsrv1
+ test_high_packet_loss_hsrv1
+ test_reordering_hsrv1
+
+ test_clean_prp
+ test_cut_link_prp
+ test_packet_loss_prp
+ test_high_packet_loss_prp
+ test_reordering_prp
+"
+
+# The tests are running ping for 5sec with a relatively short interval in
+# different scenarios with faulty links (cut links, packet loss, delay,
+# reordering) that should be recoverable by HSR/PRP. The ping interval (10ms)
+# is short enough that the base delay (50ms) leads to a queue in the netem
+# qdiscs which is needed for reordering.
+
+setup_hsr_topo()
+{
+ # Three HSR nodes in a ring, every node has a LAN A interface connected
+ # to the LAN B interface of the next node.
+ #
+ # node1 node2
+ #
+ # vethA -------- vethB
+ # hsr1 hsr2
+ # vethB vethA
+ # \ /
+ # vethA vethB
+ # hsr3
+ #
+ # node3
+
+ local ver="$1"
+
+ setup_ns node1 node2 node3
+
+ # veth links
+ # shellcheck disable=SC2154 # variables assigned by setup_ns
+ ip link add vethA netns "$node1" type veth peer name vethB netns "$node2"
+ # shellcheck disable=SC2154 # variables assigned by setup_ns
+ ip link add vethA netns "$node2" type veth peer name vethB netns "$node3"
+ ip link add vethA netns "$node3" type veth peer name vethB netns "$node1"
+
+ # MAC addresses (not needed for HSR operation, but helps with debugging)
+ ip -net "$node1" link set address 00:11:22:00:01:01 dev vethA
+ ip -net "$node1" link set address 00:11:22:00:01:02 dev vethB
+
+ ip -net "$node2" link set address 00:11:22:00:02:01 dev vethA
+ ip -net "$node2" link set address 00:11:22:00:02:02 dev vethB
+
+ ip -net "$node3" link set address 00:11:22:00:03:01 dev vethA
+ ip -net "$node3" link set address 00:11:22:00:03:02 dev vethB
+
+ # HSR interfaces
+ ip -net "$node1" link add name hsr1 type hsr proto 0 version "$ver" \
+ slave1 vethA slave2 vethB supervision 45
+ ip -net "$node2" link add name hsr2 type hsr proto 0 version "$ver" \
+ slave1 vethA slave2 vethB supervision 45
+ ip -net "$node3" link add name hsr3 type hsr proto 0 version "$ver" \
+ slave1 vethA slave2 vethB supervision 45
+
+ # IP addresses
+ ip -net "$node1" addr add 100.64.0.1/24 dev hsr1
+ ip -net "$node2" addr add 100.64.0.2/24 dev hsr2
+ ip -net "$node3" addr add 100.64.0.3/24 dev hsr3
+
+ # Set all links up
+ ip -net "$node1" link set vethA up
+ ip -net "$node1" link set vethB up
+ ip -net "$node1" link set hsr1 up
+
+ ip -net "$node2" link set vethA up
+ ip -net "$node2" link set vethB up
+ ip -net "$node2" link set hsr2 up
+
+ ip -net "$node3" link set vethA up
+ ip -net "$node3" link set vethB up
+ ip -net "$node3" link set hsr3 up
+}
+
+setup_prp_topo()
+{
+ # Two PRP nodes, connected by two links (treated as LAN A and LAN B).
+ #
+ # vethA ----- vethA
+ # prp1 prp2
+ # vethB ----- vethB
+ #
+ # node1 node2
+
+ setup_ns node1 node2
+
+ # veth links
+ ip link add vethA netns "$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 "$node2" link set address 00:11:22:00:00:02 dev vethA
+
+ # PRP interfaces
+ ip -net "$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 "$node2" addr add 100.64.0.2/24 dev prp2
+
+ # All links up
+ ip -net "$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 "$node2" link set prp2 up
+}
+
+wait_for_hsr_node_table()
+{
+ log_info "Wait for node table entries to be merged."
+ WAIT=5
+ while [ "${WAIT}" -gt 0 ]; do
+ nts=$(cat /sys/kernel/debug/hsr/hsr*/node_table)
+
+ # We need entries in the node tables, and they need to be merged
+ if (echo "$nts" | grep -qE "^([0-9a-f]{2}:){5}") && \
+ ! (echo "$nts" | grep -q "00:00:00:00:00:00"); then
+ return
+ fi
+
+ sleep 1
+ ((WAIT--))
+ done
+ check_err 1 "Failed to wait for merged node table entries"
+}
+
+setup_topo()
+{
+ local proto="$1"
+
+ if [ "$proto" = "HSRv0" ]; then
+ setup_hsr_topo 0
+ wait_for_hsr_node_table
+ elif [ "$proto" = "HSRv1" ]; then
+ setup_hsr_topo 1
+ wait_for_hsr_node_table
+ elif [ "$proto" = "PRP" ]; then
+ setup_prp_topo
+ else
+ check_err 1 "Unknown protocol (${proto})"
+ fi
+}
+
+check_ping()
+{
+ local node="$1"
+ local dst="$2"
+ local accepted_dups="$3"
+ local ping_args="-q -i 0.01 -c 400"
+
+ log_info "Running ping $node -> $dst"
+ # shellcheck disable=SC2086
+ output=$(ip netns exec "$node" ping $ping_args "$dst" | \
+ grep "packets transmitted")
+ log_info "$output"
+
+ dups=0
+ loss=0
+
+ if [[ "$output" =~ \+([0-9]+)" duplicates" ]]; then
+ dups="${BASH_REMATCH[1]}"
+ fi
+ if [[ "$output" =~ ([0-9\.]+\%)" packet loss" ]]; then
+ loss="${BASH_REMATCH[1]}"
+ fi
+
+ if [ "$dups" -gt "$accepted_dups" ]; then
+ check_err 1 "Unexpected duplicate packets (${dups})"
+ fi
+ if [ "$loss" != "0%" ]; then
+ check_err 1 "Unexpected packet loss (${loss})"
+ fi
+}
+
+test_clean()
+{
+ local proto="$1"
+
+ RET=0
+ tname="${FUNCNAME[0]} - ${proto}"
+
+ setup_topo "$proto"
+ if ((RET != ksft_pass)); then
+ log_test "${tname} setup"
+ return
+ fi
+
+ check_ping "$node1" "100.64.0.2" 0
+
+ log_test "${tname}"
+}
+
+test_clean_hsrv0()
+{
+ test_clean "HSRv0"
+}
+
+test_clean_hsrv1()
+{
+ test_clean "HSRv1"
+}
+
+test_clean_prp()
+{
+ test_clean "PRP"
+}
+
+test_cut_link()
+{
+ local proto="$1"
+
+ RET=0
+ tname="${FUNCNAME[0]} - ${proto}"
+
+ setup_topo "$proto"
+ if ((RET != ksft_pass)); then
+ log_test "${tname} setup"
+ return
+ fi
+
+ # Cutting link from subshell, so check_ping can run in the normal shell
+ # with access to global variables from the test harness.
+ (
+ sleep 2
+ log_info "Cutting link"
+ ip -net "$node1" link set vethB down
+ ) &
+ check_ping "$node1" "100.64.0.2" 0
+
+ wait
+ log_test "${tname}"
+}
+
+
+test_cut_link_hsrv0()
+{
+ test_cut_link "HSRv0"
+}
+
+test_cut_link_hsrv1()
+{
+ test_cut_link "HSRv1"
+}
+
+test_cut_link_prp()
+{
+ test_cut_link "PRP"
+}
+
+test_packet_loss()
+{
+ local proto="$1"
+ local loss="$2"
+
+ RET=0
+ tname="${FUNCNAME[0]} - ${proto}, ${loss}"
+
+ setup_topo "$proto"
+ if ((RET != ksft_pass)); then
+ log_test "${tname} setup"
+ return
+ fi
+
+ # Packet loss with lower delay makes sure the packets on the lossy link
+ # arrive first.
+ tc -net "$node1" qdisc add dev vethA root netem delay 50ms
+ tc -net "$node1" qdisc add dev vethB root netem delay 20ms loss "$loss"
+
+ check_ping "$node1" "100.64.0.2" 40
+
+ log_test "${tname}"
+}
+
+test_packet_loss_hsrv0()
+{
+ test_packet_loss "HSRv0" "20%"
+}
+
+test_packet_loss_hsrv1()
+{
+ test_packet_loss "HSRv1" "20%"
+}
+
+test_packet_loss_prp()
+{
+ test_packet_loss "PRP" "20%"
+}
+
+test_high_packet_loss_hsrv0()
+{
+ test_packet_loss "HSRv0" "80%"
+}
+
+test_high_packet_loss_hsrv1()
+{
+ test_packet_loss "HSRv1" "80%"
+}
+
+test_high_packet_loss_prp()
+{
+ test_packet_loss "PRP" "80%"
+}
+
+test_reordering()
+{
+ local proto="$1"
+
+ RET=0
+ tname="${FUNCNAME[0]} - ${proto}"
+
+ setup_topo "$proto"
+ if ((RET != ksft_pass)); then
+ log_test "${tname} setup"
+ return
+ fi
+
+ tc -net "$node1" qdisc add dev vethA root netem delay 50ms
+ tc -net "$node1" qdisc add dev vethB root netem delay 50ms reorder 20%
+
+ check_ping "$node1" "100.64.0.2" 40
+
+ log_test "${tname}"
+}
+
+test_reordering_hsrv0()
+{
+ test_reordering "HSRv0"
+}
+
+test_reordering_hsrv1()
+{
+ test_reordering "HSRv1"
+}
+
+test_reordering_prp()
+{
+ test_reordering "PRP"
+}
+
+cleanup()
+{
+ cleanup_all_ns
+}
+
+trap cleanup EXIT
+
+tests_run
+
+exit $EXIT_STATUS