1 #!/bin/bash
2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright(c) 2020 Intel Corporation, Weqaar Janjua <weqaar.a.janjua@intel.com>
4
5 # AF_XDP selftests based on veth
6 #
7 # End-to-end AF_XDP over Veth test
8 #
9 # Topology:
10 # ---------
11 # -----------
12 # _ | Process | _
13 # / ----------- \
14 # / | \
15 # / | \
16 # ----------- | -----------
17 # | Thread1 | | | Thread2 |
18 # ----------- | -----------
19 # | | |
20 # ----------- | -----------
21 # | xskX | | | xskY |
22 # ----------- | -----------
23 # | | |
24 # ----------- | ----------
25 # | vethX | --------- | vethY |
26 # ----------- peer ----------
27 #
28 # AF_XDP is an address family optimized for high performance packet processing,
29 # it is XDP’s user-space interface.
30 #
31 # An AF_XDP socket is linked to a single UMEM which is a region of virtual
32 # contiguous memory, divided into equal-sized frames.
33 #
34 # Refer to AF_XDP Kernel Documentation for detailed information:
35 # https://www.kernel.org/doc/html/latest/networking/af_xdp.html
36 #
37 # Prerequisites setup by script:
38 #
39 # Set up veth interfaces as per the topology shown ^^:
40 # * setup two veth interfaces
41 # ** veth<xxxx>
42 # ** veth<yyyy>
43 # *** xxxx and yyyy are randomly generated 4 digit numbers used to avoid
44 # conflict with any existing interface
45 # * tests the veth and xsk layers of the topology
46 #
47 # See the source xskxceiver.c for information on each test
48 #
49 # Kernel configuration:
50 # ---------------------
51 # See "config" file for recommended kernel config options.
52 #
53 # Turn on XDP sockets and veth support when compiling i.e.
54 # Networking support -->
55 # Networking options -->
56 # [ * ] XDP sockets
57 #
58 # Executing Tests:
59 # ----------------
60 # Must run with CAP_NET_ADMIN capability.
61 #
62 # Run:
63 # sudo ./test_xsk.sh
64 #
65 # If running from kselftests:
66 # sudo make run_tests
67 #
68 # Run with verbose output:
69 # sudo ./test_xsk.sh -v
70 #
71 # Set up veth interfaces and leave them up so xskxceiver can be launched in a debugger:
72 # sudo ./test_xsk.sh -d
73 #
74 # Run test suite for physical device in loopback mode
75 # sudo ./test_xsk.sh -i IFACE
76 #
77 # Run test suite in a specific mode only [skb,drv,zc]
78 # sudo ./test_xsk.sh -m MODE
79 #
80 # List available tests
81 # ./test_xsk.sh -l
82 #
83 # Run a specific test from the test suite
84 # sudo ./test_xsk.sh -t TEST_NAME
85 #
86 # Display the available command line options
87 # ./test_xsk.sh -h
88
89 . xsk_prereqs.sh
90
91 ETH=""
92
93 while getopts "vi:dm:lt:h" flag
94 do
95 case "${flag}" in
96 v) verbose=1;;
97 d) debug=1;;
98 i) ETH=${OPTARG};;
99 m) MODE=${OPTARG};;
100 l) list=1;;
101 t) TEST=${OPTARG};;
102 h) help=1;;
103 esac
104 done
105
106 TEST_NAME="PREREQUISITES"
107
108 URANDOM=/dev/urandom
109 [ ! -e "${URANDOM}" ] && { echo "${URANDOM} not found. Skipping tests."; test_exit $ksft_fail; }
110
111 VETH0_POSTFIX=$(cat ${URANDOM} | tr -dc '0-9' | fold -w 256 | head -n 1 | head --bytes 4)
112 VETH0=ve${VETH0_POSTFIX}
113 VETH1_POSTFIX=$(cat ${URANDOM} | tr -dc '0-9' | fold -w 256 | head -n 1 | head --bytes 4)
114 VETH1=ve${VETH1_POSTFIX}
115 MTU=1500
116
117 trap ctrl_c INT
118
119 function ctrl_c() {
120 cleanup_exit ${VETH0} ${VETH1}
121 exit 1
122 }
123
124 setup_vethPairs() {
125 if [[ $verbose -eq 1 ]]; then
126 echo "setting up ${VETH0}"
127 fi
128 ip link add ${VETH0} numtxqueues 4 numrxqueues 4 type veth peer name ${VETH1} numtxqueues 4 numrxqueues 4
129 if [ -f /proc/net/if_inet6 ]; then
130 echo 1 > /proc/sys/net/ipv6/conf/${VETH0}/disable_ipv6
131 echo 1 > /proc/sys/net/ipv6/conf/${VETH1}/disable_ipv6
132 fi
133 if [[ $verbose -eq 1 ]]; then
134 echo "setting up ${VETH1}"
135 fi
136
137 if [[ $busy_poll -eq 1 ]]; then
138 echo 2 > /sys/class/net/${VETH0}/napi_defer_hard_irqs
139 echo 200000 > /sys/class/net/${VETH0}/gro_flush_timeout
140 echo 2 > /sys/class/net/${VETH1}/napi_defer_hard_irqs
141 echo 200000 > /sys/class/net/${VETH1}/gro_flush_timeout
142 fi
143
144 ip link set ${VETH1} mtu ${MTU}
145 ip link set ${VETH0} mtu ${MTU}
146 ip link set ${VETH1} up
147 ip link set ${VETH0} up
148 }
149
150 if [[ $list -eq 1 ]]; then
151 ./${XSKOBJ} -l
152 exit
153 fi
154
155 if [[ $help -eq 1 ]]; then
156 ./${XSKOBJ}
157 exit
158 fi
159
160 if [ ! -z $ETH ]; then
161 VETH0=${ETH}
162 VETH1=${ETH}
163 else
164 validate_root_exec
165 validate_veth_support ${VETH0}
166 validate_ip_utility
167 setup_vethPairs
168
169 retval=$?
170 if [ $retval -ne 0 ]; then
171 test_status $retval "${TEST_NAME}"
172 cleanup_exit ${VETH0} ${VETH1}
173 exit $retval
174 fi
175 fi
176
177
178 if [[ $verbose -eq 1 ]]; then
179 ARGS+="-v "
180 fi
181
182 if [ -n "$MODE" ]; then
183 ARGS+="-m ${MODE} "
184 fi
185
186 if [ -n "$TEST" ]; then
187 ARGS+="-t ${TEST} "
188 fi
189
190 retval=$?
191 test_status $retval "${TEST_NAME}"
192
193 ## START TESTS
194
195 statusList=()
196
197 TEST_NAME="XSK_SELFTESTS_${VETH0}_SOFTIRQ"
198
199 if [[ $debug -eq 1 ]]; then
200 echo "-i" ${VETH0} "-i" ${VETH1}
201 exit
202 fi
203
204 exec_xskxceiver
205
206 if [ -z $ETH ]; then
207 cleanup_exit ${VETH0} ${VETH1}
208 else
209 cleanup_iface ${ETH} ${MTU}
210 fi
211
212 if [[ $list -eq 1 ]]; then
213 exit
214 fi
215
216 TEST_NAME="XSK_SELFTESTS_${VETH0}_BUSY_POLL"
217 busy_poll=1
218
219 if [ -z $ETH ]; then
220 setup_vethPairs
221 fi
222 exec_xskxceiver
223
224 ## END TESTS
225
226 if [ -z $ETH ]; then
227 cleanup_exit ${VETH0} ${VETH1}
228 else
229 cleanup_iface ${ETH} ${MTU}
230 fi
231
232 failures=0
233 echo -e "\nSummary:"
234 for i in "${!statusList[@]}"
235 do
236 if [ ${statusList[$i]} -ne 0 ]; then
237 test_status ${statusList[$i]} ${nameList[$i]}
238 failures=1
239 fi
240 done
241
242 if [ $failures -eq 0 ]; then
243 echo "All tests successful!"
244 fi
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