1 #!/bin/bash
2 # SPDX-License-Identifier: GPL-2.0
3
4 readonly FLUSH_PATH="/sys/class/net/${dev}/gro_flush_timeout"
5 readonly IRQ_PATH="/sys/class/net/${dev}/napi_defer_hard_irqs"
6 readonly FLUSH_TIMEOUT="$(< ${FLUSH_PATH})"
7 readonly HARD_IRQS="$(< ${IRQ_PATH})"
8 readonly server_ns=$(mktemp -u server-XXXXXXXX)
9 readonly client_ns=$(mktemp -u client-XXXXXXXX)
10
11 netdev_check_for_carrier() {
12 local -r dev="$1"
13
14 for i in {1..5}; do
15 carrier="$(cat /sys/class/net/${dev}/carrier)"
16 if [[ "${carrier}" -ne 1 ]] ; then
17 echo "carrier not ready yet..." >&2
18 sleep 1
19 else
20 echo "carrier ready" >&2
21 break
22 fi
23 done
24 echo "${carrier}"
25 }
26
27 # Assumes that there is no existing ipvlan device on the physical device
28 setup_loopback_environment() {
29 local dev="$1"
30
31 # Fail hard if cannot turn on loopback mode for current NIC
32 ethtool -K "${dev}" loopback on || exit 1
33 sleep 1
34
35 # Check for the carrier
36 carrier=$(netdev_check_for_carrier ${dev})
37 if [[ "${carrier}" -ne 1 ]] ; then
38 echo "setup_loopback_environment failed"
39 exit 1
40 fi
41 }
42
43 setup_macvlan_ns(){
44 local -r link_dev="$1"
45 local -r ns_name="$2"
46 local -r ns_dev="$3"
47 local -r ns_mac="$4"
48 local -r addr="$5"
49
50 ip link add link "${link_dev}" dev "${ns_dev}" \
51 address "${ns_mac}" type macvlan
52 exit_code=$?
53 if [[ "${exit_code}" -ne 0 ]]; then
54 echo "setup_macvlan_ns failed"
55 exit $exit_code
56 fi
57
58 [[ -e /var/run/netns/"${ns_name}" ]] || ip netns add "${ns_name}"
59 ip link set dev "${ns_dev}" netns "${ns_name}"
60 ip -netns "${ns_name}" link set dev "${ns_dev}" up
61 if [[ -n "${addr}" ]]; then
62 ip -netns "${ns_name}" addr add dev "${ns_dev}" "${addr}"
63 fi
64
65 sleep 1
66 }
67
68 cleanup_macvlan_ns(){
69 while (( $# >= 2 )); do
70 ns_name="$1"
71 ns_dev="$2"
72 ip -netns "${ns_name}" link del dev "${ns_dev}"
73 ip netns del "${ns_name}"
74 shift 2
75 done
76 }
77
78 cleanup_loopback(){
79 local -r dev="$1"
80
81 ethtool -K "${dev}" loopback off
82 sleep 1
83
84 # Check for the carrier
85 carrier=$(netdev_check_for_carrier ${dev})
86 if [[ "${carrier}" -ne 1 ]] ; then
87 echo "setup_loopback_environment failed"
88 exit 1
89 fi
90 }
91
92 setup_interrupt() {
93 # Use timer on host to trigger the network stack
94 # Also disable device interrupt to not depend on NIC interrupt
95 # Reduce test flakiness caused by unexpected interrupts
96 echo 100000 >"${FLUSH_PATH}"
97 echo 50 >"${IRQ_PATH}"
98 }
99
100 setup_ns() {
101 # Set up server_ns namespace and client_ns namespace
102 setup_macvlan_ns "${dev}" ${server_ns} server "${SERVER_MAC}"
103 setup_macvlan_ns "${dev}" ${client_ns} client "${CLIENT_MAC}"
104 }
105
106 cleanup_ns() {
107 cleanup_macvlan_ns ${server_ns} server ${client_ns} client
108 }
109
110 setup() {
111 setup_loopback_environment "${dev}"
112 setup_interrupt
113 }
114
115 cleanup() {
116 cleanup_loopback "${dev}"
117
118 echo "${FLUSH_TIMEOUT}" >"${FLUSH_PATH}"
119 echo "${HARD_IRQS}" >"${IRQ_PATH}"
120 }
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