tools/testing/selftests/drivers/net/netdevsim/hw_stats_l3.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 lib_dir=$(dirname $0)/../../../net/forwarding
   5
   6 ALL_TESTS="
   7         l3_reporting_test
   8         l3_fail_next_test
   9         l3_counter_test
  10         l3_rollback_test
  11         l3_monitor_test
  12 "
  13
  14 NETDEVSIM_PATH=/sys/bus/netdevsim/
  15 DEV_ADDR_1=1337
  16 DEV_ADDR_2=1057
  17 DEV_ADDR_3=5417
  18 NUM_NETIFS=0
  19 source $lib_dir/lib.sh
  20
  21 DUMMY_IFINDEX=
  22
  23 DEV_ADDR()
  24 {
  25         local n=$1; shift
  26         local var=DEV_ADDR_$n
  27
  28         echo ${!var}
  29 }
  30
  31 DEV()
  32 {
  33         echo netdevsim$(DEV_ADDR $1)
  34 }
  35
  36 DEVLINK_DEV()
  37 {
  38         echo netdevsim/$(DEV $1)
  39 }
  40
  41 SYSFS_NET_DIR()
  42 {
  43         echo /sys/bus/netdevsim/devices/$(DEV $1)/net/
  44 }
  45
  46 DEBUGFS_DIR()
  47 {
  48         echo /sys/kernel/debug/netdevsim/$(DEV $1)/
  49 }
  50
  51 nsim_add()
  52 {
  53         local n=$1; shift
  54
  55         echo "$(DEV_ADDR $n) 1" > ${NETDEVSIM_PATH}/new_device
  56         while [ ! -d $(SYSFS_NET_DIR $n) ] ; do :; done
  57 }
  58
  59 nsim_reload()
  60 {
  61         local n=$1; shift
  62         local ns=$1; shift
  63
  64         devlink dev reload $(DEVLINK_DEV $n) netns $ns
  65
  66         if [ $? -ne 0 ]; then
  67                 echo "Failed to reload $(DEV $n) into netns \"testns1\""
  68                 exit 1
  69         fi
  70
  71 }
  72
  73 nsim_del()
  74 {
  75         local n=$1; shift
  76
  77         echo "$(DEV_ADDR $n)" > ${NETDEVSIM_PATH}/del_device
  78 }
  79
  80 nsim_hwstats_toggle()
  81 {
  82         local action=$1; shift
  83         local instance=$1; shift
  84         local netdev=$1; shift
  85         local type=$1; shift
  86
  87         local ifindex=$($IP -j link show dev $netdev | jq '.[].ifindex')
  88
  89         echo $ifindex > $(DEBUGFS_DIR $instance)/hwstats/$type/$action
  90 }
  91
  92 nsim_hwstats_enable()
  93 {
  94         nsim_hwstats_toggle enable_ifindex "$@"
  95 }
  96
  97 nsim_hwstats_disable()
  98 {
  99         nsim_hwstats_toggle disable_ifindex "$@"
 100 }
 101
 102 nsim_hwstats_fail_next_enable()
 103 {
 104         nsim_hwstats_toggle fail_next_enable "$@"
 105 }
 106
 107 setup_prepare()
 108 {
 109         modprobe netdevsim &> /dev/null
 110         nsim_add 1
 111         nsim_add 2
 112         nsim_add 3
 113
 114         ip netns add testns1
 115
 116         if [ $? -ne 0 ]; then
 117                 echo "Failed to add netns \"testns1\""
 118                 exit 1
 119         fi
 120
 121         nsim_reload 1 testns1
 122         nsim_reload 2 testns1
 123         nsim_reload 3 testns1
 124
 125         IP="ip -n testns1"
 126
 127         $IP link add name dummy1 type dummy
 128         $IP link set dev dummy1 up
 129         DUMMY_IFINDEX=$($IP -j link show dev dummy1 | jq '.[].ifindex')
 130 }
 131
 132 cleanup()
 133 {
 134         pre_cleanup
 135
 136         $IP link del name dummy1
 137         ip netns del testns1
 138         nsim_del 3
 139         nsim_del 2
 140         nsim_del 1
 141         modprobe -r netdevsim &> /dev/null
 142 }
 143
 144 netdev_hwstats_used()
 145 {
 146         local netdev=$1; shift
 147         local type=$1; shift
 148
 149         $IP -j stats show dev "$netdev" group offload subgroup hw_stats_info |
 150             jq '.[].info.l3_stats.used'
 151 }
 152
 153 netdev_check_used()
 154 {
 155         local netdev=$1; shift
 156         local type=$1; shift
 157
 158         [[ $(netdev_hwstats_used $netdev $type) == "true" ]]
 159 }
 160
 161 netdev_check_unused()
 162 {
 163         local netdev=$1; shift
 164         local type=$1; shift
 165
 166         [[ $(netdev_hwstats_used $netdev $type) == "false" ]]
 167 }
 168
 169 netdev_hwstats_request()
 170 {
 171         local netdev=$1; shift
 172         local type=$1; shift
 173
 174         $IP -j stats show dev "$netdev" group offload subgroup hw_stats_info |
 175             jq ".[].info.${type}_stats.request"
 176 }
 177
 178 netdev_check_requested()
 179 {
 180         local netdev=$1; shift
 181         local type=$1; shift
 182
 183         [[ $(netdev_hwstats_request $netdev $type) == "true" ]]
 184 }
 185
 186 netdev_check_unrequested()
 187 {
 188         local netdev=$1; shift
 189         local type=$1; shift
 190
 191         [[ $(netdev_hwstats_request $netdev $type) == "false" ]]
 192 }
 193
 194 reporting_test()
 195 {
 196         local type=$1; shift
 197         local instance=1
 198
 199         RET=0
 200
 201         [[ -n $(netdev_hwstats_used dummy1 $type) ]]
 202         check_err $? "$type stats not reported"
 203
 204         netdev_check_unused dummy1 $type
 205         check_err $? "$type stats reported as used before either device or netdevsim request"
 206
 207         nsim_hwstats_enable $instance dummy1 $type
 208         netdev_check_unused dummy1 $type
 209         check_err $? "$type stats reported as used before device request"
 210         netdev_check_unrequested dummy1 $type
 211         check_err $? "$type stats reported as requested before device request"
 212
 213         $IP stats set dev dummy1 ${type}_stats on
 214         netdev_check_used dummy1 $type
 215         check_err $? "$type stats reported as not used after both device and netdevsim request"
 216         netdev_check_requested dummy1 $type
 217         check_err $? "$type stats reported as not requested after device request"
 218
 219         nsim_hwstats_disable $instance dummy1 $type
 220         netdev_check_unused dummy1 $type
 221         check_err $? "$type stats reported as used after netdevsim request withdrawn"
 222
 223         nsim_hwstats_enable $instance dummy1 $type
 224         netdev_check_used dummy1 $type
 225         check_err $? "$type stats reported as not used after netdevsim request reenabled"
 226
 227         $IP stats set dev dummy1 ${type}_stats off
 228         netdev_check_unused dummy1 $type
 229         check_err $? "$type stats reported as used after device request withdrawn"
 230         netdev_check_unrequested dummy1 $type
 231         check_err $? "$type stats reported as requested after device request withdrawn"
 232
 233         nsim_hwstats_disable $instance dummy1 $type
 234         netdev_check_unused dummy1 $type
 235         check_err $? "$type stats reported as used after both requests withdrawn"
 236
 237         log_test "Reporting of $type stats usage"
 238 }
 239
 240 l3_reporting_test()
 241 {
 242         reporting_test l3
 243 }
 244
 245 __fail_next_test()
 246 {
 247         local instance=$1; shift
 248         local type=$1; shift
 249
 250         RET=0
 251
 252         netdev_check_unused dummy1 $type
 253         check_err $? "$type stats reported as used before either device or netdevsim request"
 254
 255         nsim_hwstats_enable $instance dummy1 $type
 256         nsim_hwstats_fail_next_enable $instance dummy1 $type
 257         netdev_check_unused dummy1 $type
 258         check_err $? "$type stats reported as used before device request"
 259         netdev_check_unrequested dummy1 $type
 260         check_err $? "$type stats reported as requested before device request"
 261
 262         $IP stats set dev dummy1 ${type}_stats on 2>/dev/null
 263         check_fail $? "$type stats request not bounced as it should have been"
 264         netdev_check_unused dummy1 $type
 265         check_err $? "$type stats reported as used after bounce"
 266         netdev_check_unrequested dummy1 $type
 267         check_err $? "$type stats reported as requested after bounce"
 268
 269         $IP stats set dev dummy1 ${type}_stats on
 270         check_err $? "$type stats request failed when it shouldn't have"
 271         netdev_check_used dummy1 $type
 272         check_err $? "$type stats reported as not used after both device and netdevsim request"
 273         netdev_check_requested dummy1 $type
 274         check_err $? "$type stats reported as not requested after device request"
 275
 276         $IP stats set dev dummy1 ${type}_stats off
 277         nsim_hwstats_disable $instance dummy1 $type
 278
 279         log_test "Injected failure of $type stats enablement (netdevsim #$instance)"
 280 }
 281
 282 fail_next_test()
 283 {
 284         __fail_next_test 1 "$@"
 285         __fail_next_test 2 "$@"
 286         __fail_next_test 3 "$@"
 287 }
 288
 289 l3_fail_next_test()
 290 {
 291         fail_next_test l3
 292 }
 293
 294 get_hwstat()
 295 {
 296         local netdev=$1; shift
 297         local type=$1; shift
 298         local selector=$1; shift
 299
 300         $IP -j stats show dev $netdev group offload subgroup ${type}_stats |
 301                   jq ".[0].stats64.${selector}"
 302 }
 303
 304 counter_test()
 305 {
 306         local type=$1; shift
 307         local instance=1
 308
 309         RET=0
 310
 311         nsim_hwstats_enable $instance dummy1 $type
 312         $IP stats set dev dummy1 ${type}_stats on
 313         netdev_check_used dummy1 $type
 314         check_err $? "$type stats reported as not used after both device and netdevsim request"
 315
 316         # Netdevsim counts 10pps on ingress. We should see maybe a couple
 317         # packets, unless things take a reeealy long time.
 318         local pkts=$(get_hwstat dummy1 l3 rx.packets)
 319         ((pkts < 10))
 320         check_err $? "$type stats show >= 10 packets after first enablement"
 321
 322         sleep 2.5
 323
 324         local pkts=$(get_hwstat dummy1 l3 rx.packets)
 325         ((pkts >= 20))
 326         check_err $? "$type stats show < 20 packets after 2.5s passed"
 327
 328         $IP stats set dev dummy1 ${type}_stats off
 329
 330         sleep 2
 331
 332         $IP stats set dev dummy1 ${type}_stats on
 333         local pkts=$(get_hwstat dummy1 l3 rx.packets)
 334         ((pkts < 10))
 335         check_err $? "$type stats show >= 10 packets after second enablement"
 336
 337         $IP stats set dev dummy1 ${type}_stats off
 338         nsim_hwstats_fail_next_enable $instance dummy1 $type
 339         $IP stats set dev dummy1 ${type}_stats on 2>/dev/null
 340         check_fail $? "$type stats request not bounced as it should have been"
 341
 342         sleep 2
 343
 344         $IP stats set dev dummy1 ${type}_stats on
 345         local pkts=$(get_hwstat dummy1 l3 rx.packets)
 346         ((pkts < 10))
 347         check_err $? "$type stats show >= 10 packets after post-fail enablement"
 348
 349         $IP stats set dev dummy1 ${type}_stats off
 350
 351         log_test "Counter values in $type stats"
 352 }
 353
 354 l3_counter_test()
 355 {
 356         counter_test l3
 357 }
 358
 359 rollback_test()
 360 {
 361         local type=$1; shift
 362
 363         RET=0
 364
 365         nsim_hwstats_enable 1 dummy1 l3
 366         nsim_hwstats_enable 2 dummy1 l3
 367         nsim_hwstats_enable 3 dummy1 l3
 368
 369         # The three netdevsim instances are registered in order of their number
 370         # one after another. It is reasonable to expect that whatever
 371         # notifications take place hit no. 2 in between hitting nos. 1 and 3,
 372         # whatever the actual order. This allows us to test that a fail caused
 373         # by no. 2 does not leave the system in a partial state, and rolls
 374         # everything back.
 375
 376         nsim_hwstats_fail_next_enable 2 dummy1 l3
 377         $IP stats set dev dummy1 ${type}_stats on 2>/dev/null
 378         check_fail $? "$type stats request not bounced as it should have been"
 379
 380         netdev_check_unused dummy1 $type
 381         check_err $? "$type stats reported as used after bounce"
 382         netdev_check_unrequested dummy1 $type
 383         check_err $? "$type stats reported as requested after bounce"
 384
 385         sleep 2
 386
 387         $IP stats set dev dummy1 ${type}_stats on
 388         check_err $? "$type stats request not upheld as it should have been"
 389
 390         local pkts=$(get_hwstat dummy1 l3 rx.packets)
 391         ((pkts < 10))
 392         check_err $? "$type stats show $pkts packets after post-fail enablement"
 393
 394         $IP stats set dev dummy1 ${type}_stats off
 395
 396         nsim_hwstats_disable 3 dummy1 l3
 397         nsim_hwstats_disable 2 dummy1 l3
 398         nsim_hwstats_disable 1 dummy1 l3
 399
 400         log_test "Failure in $type stats enablement rolled back"
 401 }
 402
 403 l3_rollback_test()
 404 {
 405         rollback_test l3
 406 }
 407
 408 l3_monitor_test()
 409 {
 410         hw_stats_monitor_test dummy1 l3            \
 411                 "nsim_hwstats_enable 1 dummy1 l3"  \
 412                 "nsim_hwstats_disable 1 dummy1 l3" \
 413                 "$IP"
 414 }
 415
 416 trap cleanup EXIT
 417
 418 setup_prepare
 419 tests_run
 420
 421 exit $EXIT_STATUS