FM / net

/usr/src/linux-headers-5.15.0-190/tools/testing/selftests/net/

/usr/src/linux-headers-5.15.0-190/tools/testing/selftests/net

Name	Size	Mode	Actions
af_unix/	-	0755	rm
forwarding/	-	0755	rm
mptcp/	-	0755	rm
altnames.sh	1817	0755	edit dl rm
bareudp.sh	21290	0755	edit dl rm
drop_monitor_tests.sh	4439	0755	edit dl rm
fcnal-test.sh	103221	0755	edit dl rm
fib-onlink-tests.sh	12409	0755	edit dl rm
fib_nexthops.sh	68003	0755	edit dl rm
fib_nexthop_multiprefix.sh	5870	0755	edit dl rm
fib_nexthop_nongw.sh	2327	0755	edit dl rm
fib_rule_tests.sh	5981	0755	edit dl rm
fib_tests.sh	57224	0755	edit dl rm
fin_ack_lat.sh	507	0755	edit dl rm
gre_gso.sh	4237	0755	edit dl rm
gro.sh	2132	0755	edit dl rm
icmp.sh	2618	0755	edit dl rm
icmp_redirect.sh	12820	0755	edit dl rm
in_netns.sh	323	0755	edit dl rm
ioam6.sh	25962	0755	edit dl rm
ip6_gre_headroom.sh	1400	0755	edit dl rm
ipv6_flowlabel.sh	502	0755	edit dl rm
ip_defrag.sh	2087	0755	edit dl rm
l2tp.sh	9909	0755	edit dl rm
lib.sh	597	0644	edit dl rm
Makefile	2499	0644	edit dl rm
msg_zerocopy.sh	3012	0755	edit dl rm
netdevice.sh	4521	0755	edit dl rm
net_helper.sh	514	0644	edit dl rm
pmtu.sh	74711	0755	edit dl rm
psock_snd.sh	2252	0755	edit dl rm
reuseaddr_ports_exhausted.sh	635	0755	edit dl rm
reuseport_addr_any.sh	81	0755	edit dl rm
route_localnet.sh	1871	0755	edit dl rm
rtnetlink.sh	29476	0755	edit dl rm
rxtimestamp.sh	79	0755	edit dl rm
setup_loopback.sh	2654	0644	edit dl rm
setup_veth.sh	929	0644	edit dl rm
so_txtime.sh	2434	0755	edit dl rm
srv6_end_dt4_l3vpn_test.sh	17454	0755	edit dl rm
srv6_end_dt6_l3vpn_test.sh	17615	0755	edit dl rm
srv6_end_dt46_l3vpn_test.sh	21121	0755	edit dl rm
tcp_fastopen_backup_key.sh	1086	0755	edit dl rm
test_blackhole_dev.sh	280	0755	edit dl rm
test_bpf.sh	225	0755	edit dl rm
test_vxlan_fdb_changelink.sh	678	0755	edit dl rm
test_vxlan_under_vrf.sh	5607	0755	edit dl rm
toeplitz.sh	4983	0755	edit dl rm
toeplitz_client.sh	667	0755	edit dl rm
traceroute.sh	7131	0755	edit dl rm
txtimestamp.sh	1702	0755	edit dl rm
udpgro.sh	5988	0755	edit dl rm
udpgro_bench.sh	2126	0755	edit dl rm
udpgro_fwd.sh	7145	0755	edit dl rm
udpgso.sh	545	0755	edit dl rm
udpgso_bench.sh	2852	0755	edit dl rm
unicast_extensions.sh	8263	0755	edit dl rm
veth.sh	10441	0755	edit dl rm
vrf-xfrm-tests.sh	10970	0755	edit dl rm
vrf_route_leaking.sh	14946	0755	edit dl rm
vrf_strict_mode_test.sh	7688	0755	edit dl rm
xfrm_policy.sh	14759	0755	edit dl rm

Edit: /usr/src/linux-headers-5.15.0-190/tools/testing/selftests/net/setup_loopback.sh (2654B)

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0

readonly FLUSH_PATH="/sys/class/net/${dev}/gro_flush_timeout"
readonly IRQ_PATH="/sys/class/net/${dev}/napi_defer_hard_irqs"
readonly FLUSH_TIMEOUT="$(< ${FLUSH_PATH})"
readonly HARD_IRQS="$(< ${IRQ_PATH})"

netdev_check_for_carrier() {
	local -r dev="$1"

for i in {1..5}; do
		carrier="$(cat /sys/class/net/${dev}/carrier)"
		if [[ "${carrier}" -ne 1 ]] ; then
			echo "carrier not ready yet..." >&2
			sleep 1
		else
			echo "carrier ready" >&2
			break
		fi
	done
	echo "${carrier}"
}

# Assumes that there is no existing ipvlan device on the physical device
setup_loopback_environment() {
	local dev="$1"

# Fail hard if cannot turn on loopback mode for current NIC
	ethtool -K "${dev}" loopback on || exit 1
	sleep 1

# Check for the carrier
	carrier=$(netdev_check_for_carrier ${dev})
	if [[ "${carrier}" -ne 1 ]] ; then
		echo "setup_loopback_environment failed"
		exit 1
	fi
}

setup_macvlan_ns(){
	local -r link_dev="$1"
	local -r ns_name="$2"
	local -r ns_dev="$3"
	local -r ns_mac="$4"
	local -r addr="$5"

ip link add link "${link_dev}" dev "${ns_dev}" \
		address "${ns_mac}" type macvlan
	exit_code=$?
	if [[ "${exit_code}" -ne 0 ]]; then
		echo "setup_macvlan_ns failed"
		exit $exit_code
	fi

[[ -e /var/run/netns/"${ns_name}" ]] || ip netns add "${ns_name}"
	ip link set dev "${ns_dev}" netns "${ns_name}"
	ip -netns "${ns_name}" link set dev "${ns_dev}" up
	if [[ -n "${addr}" ]]; then
		ip -netns "${ns_name}" addr add dev "${ns_dev}" "${addr}"
	fi

sleep 1
}

cleanup_macvlan_ns(){
	while (( $# >= 2 )); do
		ns_name="$1"
		ns_dev="$2"
		ip -netns "${ns_name}" link del dev "${ns_dev}"
		ip netns del "${ns_name}"
		shift 2
	done
}

cleanup_loopback(){
	local -r dev="$1"

ethtool -K "${dev}" loopback off
	sleep 1

# Check for the carrier
	carrier=$(netdev_check_for_carrier ${dev})
	if [[ "${carrier}" -ne 1 ]] ; then
		echo "setup_loopback_environment failed"
		exit 1
	fi
}

setup_interrupt() {
	# Use timer on  host to trigger the network stack
	# Also disable device interrupt to not depend on NIC interrupt
	# Reduce test flakiness caused by unexpected interrupts
	echo 100000 >"${FLUSH_PATH}"
	echo 50 >"${IRQ_PATH}"
}

setup_ns() {
	# Set up server_ns namespace and client_ns namespace
	setup_macvlan_ns "${dev}" server_ns server "${SERVER_MAC}"
	setup_macvlan_ns "${dev}" client_ns client "${CLIENT_MAC}"
}

cleanup_ns() {
	cleanup_macvlan_ns server_ns server client_ns client
}

setup() {
	setup_loopback_environment "${dev}"
	setup_interrupt
}

cleanup() {
	cleanup_loopback "${dev}"

echo "${FLUSH_TIMEOUT}" >"${FLUSH_PATH}"
	echo "${HARD_IRQS}" >"${IRQ_PATH}"
}

cmd: