1 #!/bin/bash
2 # SPDX-License-Identifier: GPL-2.0
3
4 # This test is for checking drop monitor functionality.
5 source lib.sh
6 ret=0
7
8 # all tests in this script. Can be overridden with -t option
9 TESTS="
10 sw_drops
11 hw_drops
12 "
13
14 NETDEVSIM_PATH=/sys/bus/netdevsim/
15 DEV_ADDR=1337
16 DEV=netdevsim${DEV_ADDR}
17 DEVLINK_DEV=netdevsim/${DEV}
18
19 log_test()
20 {
21 local rc=$1
22 local expected=$2
23 local msg="$3"
24
25 if [ ${rc} -eq ${expected} ]; then
26 printf " TEST: %-60s [ OK ]\n" "${msg}"
27 nsuccess=$((nsuccess+1))
28 else
29 ret=1
30 nfail=$((nfail+1))
31 printf " TEST: %-60s [FAIL]\n" "${msg}"
32 fi
33 }
34
35 setup()
36 {
37 modprobe netdevsim &> /dev/null
38
39 set -e
40 setup_ns NS1
41 $IP link add dummy10 up type dummy
42
43 $NS_EXEC echo "$DEV_ADDR 1" > ${NETDEVSIM_PATH}/new_device
44 udevadm settle
45 local netdev=$($NS_EXEC ls ${NETDEVSIM_PATH}/devices/${DEV}/net/)
46 $IP link set dev $netdev up
47
48 set +e
49 }
50
51 cleanup()
52 {
53 $NS_EXEC echo "$DEV_ADDR" > ${NETDEVSIM_PATH}/del_device
54 cleanup_ns ${NS1}
55 }
56
57 sw_drops_test()
58 {
59 echo
60 echo "Software drops test"
61
62 setup
63
64 local dir=$(mktemp -d)
65
66 $TC qdisc add dev dummy10 clsact
67 $TC filter add dev dummy10 egress pref 1 handle 101 proto ip \
68 flower dst_ip 192.0.2.10 action drop
69
70 $NS_EXEC mausezahn dummy10 -a 00:11:22:33:44:55 -b 00:aa:bb:cc:dd:ee \
71 -A 192.0.2.1 -B 192.0.2.10 -t udp sp=12345,dp=54321 -c 0 -q \
72 -d 100msec &
73 timeout 5 dwdump -o sw -w ${dir}/packets.pcap
74 (( $(tshark -r ${dir}/packets.pcap \
75 -Y 'ip.dst == 192.0.2.10' 2> /dev/null | wc -l) != 0))
76 log_test $? 0 "Capturing active software drops"
77
78 rm ${dir}/packets.pcap
79
80 { kill %% && wait %%; } 2>/dev/null
81 timeout 5 dwdump -o sw -w ${dir}/packets.pcap
82 (( $(tshark -r ${dir}/packets.pcap \
83 -Y 'ip.dst == 192.0.2.10' 2> /dev/null | wc -l) == 0))
84 log_test $? 0 "Capturing inactive software drops"
85
86 rm -r $dir
87
88 cleanup
89 }
90
91 hw_drops_test()
92 {
93 echo
94 echo "Hardware drops test"
95
96 setup
97
98 local dir=$(mktemp -d)
99
100 $DEVLINK trap set $DEVLINK_DEV trap blackhole_route action trap
101 timeout 5 dwdump -o hw -w ${dir}/packets.pcap
102 (( $(tshark -r ${dir}/packets.pcap \
103 -Y 'net_dm.hw_trap_name== blackhole_route' 2> /dev/null \
104 | wc -l) != 0))
105 log_test $? 0 "Capturing active hardware drops"
106
107 rm ${dir}/packets.pcap
108
109 $DEVLINK trap set $DEVLINK_DEV trap blackhole_route action drop
110 timeout 5 dwdump -o hw -w ${dir}/packets.pcap
111 (( $(tshark -r ${dir}/packets.pcap \
112 -Y 'net_dm.hw_trap_name== blackhole_route' 2> /dev/null \
113 | wc -l) == 0))
114 log_test $? 0 "Capturing inactive hardware drops"
115
116 rm -r $dir
117
118 cleanup
119 }
120
121 ################################################################################
122 # usage
123
124 usage()
125 {
126 cat <<EOF
127 usage: ${0##*/} OPTS
128
129 -t <test> Test(s) to run (default: all)
130 (options: $TESTS)
131 EOF
132 }
133
134 ################################################################################
135 # main
136
137 while getopts ":t:h" opt; do
138 case $opt in
139 t) TESTS=$OPTARG;;
140 h) usage; exit 0;;
141 *) usage; exit 1;;
142 esac
143 done
144
145 if [ "$(id -u)" -ne 0 ];then
146 echo "SKIP: Need root privileges"
147 exit $ksft_skip;
148 fi
149
150 if [ ! -x "$(command -v ip)" ]; then
151 echo "SKIP: Could not run test without ip tool"
152 exit $ksft_skip
153 fi
154
155 if [ ! -x "$(command -v devlink)" ]; then
156 echo "SKIP: Could not run test without devlink tool"
157 exit $ksft_skip
158 fi
159
160 if [ ! -x "$(command -v tshark)" ]; then
161 echo "SKIP: Could not run test without tshark tool"
162 exit $ksft_skip
163 fi
164
165 if [ ! -x "$(command -v dwdump)" ]; then
166 echo "SKIP: Could not run test without dwdump tool"
167 exit $ksft_skip
168 fi
169
170 if [ ! -x "$(command -v udevadm)" ]; then
171 echo "SKIP: Could not run test without udevadm tool"
172 exit $ksft_skip
173 fi
174
175 if [ ! -x "$(command -v timeout)" ]; then
176 echo "SKIP: Could not run test without timeout tool"
177 exit $ksft_skip
178 fi
179
180 if [ ! -x "$(command -v mausezahn)" ]; then
181 echo "SKIP: Could not run test without mausezahn tool"
182 exit $ksft_skip
183 fi
184
185 tshark -G fields 2> /dev/null | grep -q net_dm
186 if [ $? -ne 0 ]; then
187 echo "SKIP: tshark too old, missing net_dm dissector"
188 exit $ksft_skip
189 fi
190
191 # create netns first so we can get the namespace name
192 setup_ns NS1
193 cleanup &> /dev/null
194 trap cleanup EXIT
195
196 IP="ip -netns ${NS1}"
197 TC="tc -netns ${NS1}"
198 DEVLINK="devlink -N ${NS1}"
199 NS_EXEC="ip netns exec ${NS1}"
200
201 for t in $TESTS
202 do
203 case $t in
204 sw_drops|sw) sw_drops_test;;
205 hw_drops|hw) hw_drops_test;;
206
207 help) echo "Test names: $TESTS"; exit 0;;
208 esac
209 done
210
211 if [ "$TESTS" != "none" ]; then
212 printf "\nTests passed: %3d\n" ${nsuccess}
213 printf "Tests failed: %3d\n" ${nfail}
214 fi
215
216 exit $ret
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