xref: /linux/tools/testing/selftests/net/lib.sh (revision 10c8d1bd786508e996837d5d4b125c69315c5529) 
1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3
4##############################################################################
5# Defines
6
7: "${WAIT_TIMEOUT:=20}"
8
9BUSYWAIT_TIMEOUT=$((WAIT_TIMEOUT * 1000)) # ms
10
11# Kselftest framework constants.
12ksft_pass=0
13ksft_fail=1
14ksft_xfail=2
15ksft_skip=4
16
17# namespace list created by setup_ns
18NS_LIST=()
19
20##############################################################################
21# Helpers
22
23__ksft_status_merge()
24{
25	local a=$1; shift
26	local b=$1; shift
27	local -A weights
28	local weight=0
29
30	local i
31	for i in "$@"; do
32		weights[$i]=$((weight++))
33	done
34
35	if [[ ${weights[$a]} > ${weights[$b]} ]]; then
36		echo "$a"
37		return 0
38	else
39		echo "$b"
40		return 1
41	fi
42}
43
44ksft_status_merge()
45{
46	local a=$1; shift
47	local b=$1; shift
48
49	__ksft_status_merge "$a" "$b" \
50		$ksft_pass $ksft_xfail $ksft_skip $ksft_fail
51}
52
53ksft_exit_status_merge()
54{
55	local a=$1; shift
56	local b=$1; shift
57
58	__ksft_status_merge "$a" "$b" \
59		$ksft_xfail $ksft_pass $ksft_skip $ksft_fail
60}
61
62loopy_wait()
63{
64	local sleep_cmd=$1; shift
65	local timeout_ms=$1; shift
66
67	local start_time="$(date -u +%s%3N)"
68	while true
69	do
70		local out
71		if out=$("$@"); then
72			echo -n "$out"
73			return 0
74		fi
75
76		local current_time="$(date -u +%s%3N)"
77		if ((current_time - start_time > timeout_ms)); then
78			echo -n "$out"
79			return 1
80		fi
81
82		$sleep_cmd
83	done
84}
85
86busywait()
87{
88	local timeout_ms=$1; shift
89
90	loopy_wait : "$timeout_ms" "$@"
91}
92
93# timeout in seconds
94slowwait()
95{
96	local timeout_sec=$1; shift
97
98	loopy_wait "sleep 0.1" "$((timeout_sec * 1000))" "$@"
99}
100
101until_counter_is()
102{
103	local expr=$1; shift
104	local current=$("$@")
105
106	echo $((current))
107	((current $expr))
108}
109
110busywait_for_counter()
111{
112	local timeout=$1; shift
113	local delta=$1; shift
114
115	local base=$("$@")
116	busywait "$timeout" until_counter_is ">= $((base + delta))" "$@"
117}
118
119slowwait_for_counter()
120{
121	local timeout=$1; shift
122	local delta=$1; shift
123
124	local base=$("$@")
125	slowwait "$timeout" until_counter_is ">= $((base + delta))" "$@"
126}
127
128remove_ns_list()
129{
130	local item=$1
131	local ns
132	local ns_list=("${NS_LIST[@]}")
133	NS_LIST=()
134
135	for ns in "${ns_list[@]}"; do
136		if [ "${ns}" != "${item}" ]; then
137			NS_LIST+=("${ns}")
138		fi
139	done
140}
141
142cleanup_ns()
143{
144	local ns=""
145	local ret=0
146
147	for ns in "$@"; do
148		[ -z "${ns}" ] && continue
149		ip netns pids "${ns}" 2> /dev/null | xargs -r kill || true
150		ip netns delete "${ns}" &> /dev/null || true
151		if ! busywait $BUSYWAIT_TIMEOUT ip netns list \| grep -vq "^$ns$" &> /dev/null; then
152			echo "Warn: Failed to remove namespace $ns"
153			ret=1
154		else
155			remove_ns_list "${ns}"
156		fi
157	done
158
159	return $ret
160}
161
162cleanup_all_ns()
163{
164	cleanup_ns "${NS_LIST[@]}"
165}
166
167# setup netns with given names as prefix. e.g
168# setup_ns local remote
169setup_ns()
170{
171	local ns_name=""
172	local ns_list=()
173	for ns_name in "$@"; do
174		# avoid conflicts with local var: internal error
175		if [ "${ns_name}" = "ns_name" ]; then
176			echo "Failed to setup namespace '${ns_name}': invalid name"
177			cleanup_ns "${ns_list[@]}"
178			exit $ksft_fail
179		fi
180
181		# Some test may setup/remove same netns multi times
182		if [ -z "${!ns_name}" ]; then
183			eval "${ns_name}=${ns_name,,}-$(mktemp -u XXXXXX)"
184		else
185			cleanup_ns "${!ns_name}"
186		fi
187
188		if ! ip netns add "${!ns_name}"; then
189			echo "Failed to create namespace $ns_name"
190			cleanup_ns "${ns_list[@]}"
191			return $ksft_skip
192		fi
193		ip -n "${!ns_name}" link set lo up
194		ns_list+=("${!ns_name}")
195	done
196	NS_LIST+=("${ns_list[@]}")
197}
198
199tc_rule_stats_get()
200{
201	local dev=$1; shift
202	local pref=$1; shift
203	local dir=${1:-ingress}; shift
204	local selector=${1:-.packets}; shift
205
206	tc -j -s filter show dev $dev $dir pref $pref \
207	    | jq ".[1].options.actions[].stats$selector"
208}
209
210tc_rule_handle_stats_get()
211{
212	local id=$1; shift
213	local handle=$1; shift
214	local selector=${1:-.packets}; shift
215	local netns=${1:-""}; shift
216
217	tc $netns -j -s filter show $id \
218	    | jq ".[] | select(.options.handle == $handle) | \
219		  .options.actions[0].stats$selector"
220}
221