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

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3 #
   4 # This test is for checking devlink-trap functionality. It makes use of
   5 # netdevsim which implements the required callbacks.
   6
   7 lib_dir=$(dirname $0)/../../../net/forwarding
   8
   9 ALL_TESTS="
  10         init_test
  11         trap_action_test
  12         trap_metadata_test
  13         bad_trap_test
  14         bad_trap_action_test
  15         trap_stats_test
  16         trap_group_action_test
  17         bad_trap_group_test
  18         trap_group_stats_test
  19         trap_policer_test
  20         trap_policer_bind_test
  21         port_del_test
  22         dev_del_test
  23 "
  24 NETDEVSIM_PATH=/sys/bus/netdevsim/
  25 DEV_ADDR=1337
  26 DEV=netdevsim${DEV_ADDR}
  27 DEVLINK_DEV=netdevsim/${DEV}
  28 DEBUGFS_DIR=/sys/kernel/debug/netdevsim/$DEV/
  29 SLEEP_TIME=1
  30 NETDEV=""
  31 NUM_NETIFS=0
  32 source $lib_dir/lib.sh
  33 source $lib_dir/devlink_lib.sh
  34
  35 require_command udevadm
  36
  37 modprobe netdevsim &> /dev/null
  38 if [ ! -d "$NETDEVSIM_PATH" ]; then
  39         echo "SKIP: No netdevsim support"
  40         exit 1
  41 fi
  42
  43 if [ -d "${NETDEVSIM_PATH}/devices/netdevsim${DEV_ADDR}" ]; then
  44         echo "SKIP: Device netdevsim${DEV_ADDR} already exists"
  45         exit 1
  46 fi
  47
  48 init_test()
  49 {
  50         RET=0
  51
  52         test $(devlink_traps_num_get) -ne 0
  53         check_err $? "No traps were registered"
  54
  55         log_test "Initialization"
  56 }
  57
  58 trap_action_test()
  59 {
  60         local orig_action
  61         local trap_name
  62         local action
  63
  64         RET=0
  65
  66         for trap_name in $(devlink_traps_get); do
  67                 # The action of non-drop traps cannot be changed.
  68                 if [ $(devlink_trap_type_get $trap_name) = "drop" ]; then
  69                         devlink_trap_action_set $trap_name "trap"
  70                         action=$(devlink_trap_action_get $trap_name)
  71                         if [ $action != "trap" ]; then
  72                                 check_err 1 "Trap $trap_name did not change action to trap"
  73                         fi
  74
  75                         devlink_trap_action_set $trap_name "drop"
  76                         action=$(devlink_trap_action_get $trap_name)
  77                         if [ $action != "drop" ]; then
  78                                 check_err 1 "Trap $trap_name did not change action to drop"
  79                         fi
  80                 else
  81                         orig_action=$(devlink_trap_action_get $trap_name)
  82
  83                         devlink_trap_action_set $trap_name "trap"
  84                         action=$(devlink_trap_action_get $trap_name)
  85                         if [ $action != $orig_action ]; then
  86                                 check_err 1 "Trap $trap_name changed action when should not"
  87                         fi
  88
  89                         devlink_trap_action_set $trap_name "drop"
  90                         action=$(devlink_trap_action_get $trap_name)
  91                         if [ $action != $orig_action ]; then
  92                                 check_err 1 "Trap $trap_name changed action when should not"
  93                         fi
  94                 fi
  95         done
  96
  97         log_test "Trap action"
  98 }
  99
 100 trap_metadata_test()
 101 {
 102         local trap_name
 103
 104         RET=0
 105
 106         for trap_name in $(devlink_traps_get); do
 107                 devlink_trap_metadata_test $trap_name "input_port"
 108                 check_err $? "Input port not reported as metadata of trap $trap_name"
 109                 if [ $trap_name == "ingress_flow_action_drop" ] ||
 110                    [ $trap_name == "egress_flow_action_drop" ]; then
 111                         devlink_trap_metadata_test $trap_name "flow_action_cookie"
 112                         check_err $? "Flow action cookie not reported as metadata of trap $trap_name"
 113                 fi
 114         done
 115
 116         log_test "Trap metadata"
 117 }
 118
 119 bad_trap_test()
 120 {
 121         RET=0
 122
 123         devlink_trap_action_set "made_up_trap" "drop"
 124         check_fail $? "Did not get an error for non-existing trap"
 125
 126         log_test "Non-existing trap"
 127 }
 128
 129 bad_trap_action_test()
 130 {
 131         local traps_arr
 132         local trap_name
 133
 134         RET=0
 135
 136         # Pick first trap.
 137         traps_arr=($(devlink_traps_get))
 138         trap_name=${traps_arr[0]}
 139
 140         devlink_trap_action_set $trap_name "made_up_action"
 141         check_fail $? "Did not get an error for non-existing trap action"
 142
 143         log_test "Non-existing trap action"
 144 }
 145
 146 trap_stats_test()
 147 {
 148         local trap_name
 149
 150         RET=0
 151
 152         for trap_name in $(devlink_traps_get); do
 153                 devlink_trap_stats_idle_test $trap_name
 154                 check_err $? "Stats of trap $trap_name not idle when netdev down"
 155
 156                 ip link set dev $NETDEV up
 157
 158                 if [ $(devlink_trap_type_get $trap_name) = "drop" ]; then
 159                         devlink_trap_action_set $trap_name "trap"
 160                         devlink_trap_stats_idle_test $trap_name
 161                         check_fail $? "Stats of trap $trap_name idle when action is trap"
 162
 163                         devlink_trap_action_set $trap_name "drop"
 164                         devlink_trap_stats_idle_test $trap_name
 165                         check_err $? "Stats of trap $trap_name not idle when action is drop"
 166                 else
 167                         devlink_trap_stats_idle_test $trap_name
 168                         check_fail $? "Stats of non-drop trap $trap_name idle when should not"
 169                 fi
 170
 171                 ip link set dev $NETDEV down
 172         done
 173
 174         log_test "Trap statistics"
 175 }
 176
 177 trap_group_action_test()
 178 {
 179         local curr_group group_name
 180         local trap_name
 181         local trap_type
 182         local action
 183
 184         RET=0
 185
 186         for group_name in $(devlink_trap_groups_get); do
 187                 devlink_trap_group_action_set $group_name "trap"
 188
 189                 for trap_name in $(devlink_traps_get); do
 190                         curr_group=$(devlink_trap_group_get $trap_name)
 191                         if [ $curr_group != $group_name ]; then
 192                                 continue
 193                         fi
 194
 195                         trap_type=$(devlink_trap_type_get $trap_name)
 196                         if [ $trap_type != "drop" ]; then
 197                                 continue
 198                         fi
 199
 200                         action=$(devlink_trap_action_get $trap_name)
 201                         if [ $action != "trap" ]; then
 202                                 check_err 1 "Trap $trap_name did not change action to trap"
 203                         fi
 204                 done
 205
 206                 devlink_trap_group_action_set $group_name "drop"
 207
 208                 for trap_name in $(devlink_traps_get); do
 209                         curr_group=$(devlink_trap_group_get $trap_name)
 210                         if [ $curr_group != $group_name ]; then
 211                                 continue
 212                         fi
 213
 214                         trap_type=$(devlink_trap_type_get $trap_name)
 215                         if [ $trap_type != "drop" ]; then
 216                                 continue
 217                         fi
 218
 219                         action=$(devlink_trap_action_get $trap_name)
 220                         if [ $action != "drop" ]; then
 221                                 check_err 1 "Trap $trap_name did not change action to drop"
 222                         fi
 223                 done
 224         done
 225
 226         log_test "Trap group action"
 227 }
 228
 229 bad_trap_group_test()
 230 {
 231         RET=0
 232
 233         devlink_trap_group_action_set "made_up_trap_group" "drop"
 234         check_fail $? "Did not get an error for non-existing trap group"
 235
 236         log_test "Non-existing trap group"
 237 }
 238
 239 trap_group_stats_test()
 240 {
 241         local group_name
 242
 243         RET=0
 244
 245         for group_name in $(devlink_trap_groups_get); do
 246                 devlink_trap_group_stats_idle_test $group_name
 247                 check_err $? "Stats of trap group $group_name not idle when netdev down"
 248
 249                 ip link set dev $NETDEV up
 250
 251                 devlink_trap_group_action_set $group_name "trap"
 252                 devlink_trap_group_stats_idle_test $group_name
 253                 check_fail $? "Stats of trap group $group_name idle when action is trap"
 254
 255                 devlink_trap_group_action_set $group_name "drop"
 256                 ip link set dev $NETDEV down
 257         done
 258
 259         log_test "Trap group statistics"
 260 }
 261
 262 trap_policer_test()
 263 {
 264         local packets_t0
 265         local packets_t1
 266
 267         if [ $(devlink_trap_policers_num_get) -eq 0 ]; then
 268                 check_err 1 "Failed to dump policers"
 269         fi
 270
 271         devlink trap policer set $DEVLINK_DEV policer 1337 &> /dev/null
 272         check_fail $? "Did not get an error for setting a non-existing policer"
 273         devlink trap policer show $DEVLINK_DEV policer 1337 &> /dev/null
 274         check_fail $? "Did not get an error for getting a non-existing policer"
 275
 276         devlink trap policer set $DEVLINK_DEV policer 1 rate 2000 burst 16
 277         check_err $? "Failed to set valid parameters for a valid policer"
 278         if [ $(devlink_trap_policer_rate_get 1) -ne 2000 ]; then
 279                 check_err 1 "Policer rate was not changed"
 280         fi
 281         if [ $(devlink_trap_policer_burst_get 1) -ne 16 ]; then
 282                 check_err 1 "Policer burst size was not changed"
 283         fi
 284
 285         devlink trap policer set $DEVLINK_DEV policer 1 rate 0 &> /dev/null
 286         check_fail $? "Policer rate was changed to rate lower than limit"
 287         devlink trap policer set $DEVLINK_DEV policer 1 rate 9000 &> /dev/null
 288         check_fail $? "Policer rate was changed to rate higher than limit"
 289         devlink trap policer set $DEVLINK_DEV policer 1 burst 2 &> /dev/null
 290         check_fail $? "Policer burst size was changed to burst size lower than limit"
 291         devlink trap policer set $DEVLINK_DEV policer 1 rate 65537 &> /dev/null
 292         check_fail $? "Policer burst size was changed to burst size higher than limit"
 293         echo "y" > $DEBUGFS_DIR/fail_trap_policer_set
 294         devlink trap policer set $DEVLINK_DEV policer 1 rate 3000 &> /dev/null
 295         check_fail $? "Managed to set policer rate when should not"
 296         echo "n" > $DEBUGFS_DIR/fail_trap_policer_set
 297         if [ $(devlink_trap_policer_rate_get 1) -ne 2000 ]; then
 298                 check_err 1 "Policer rate was changed to an invalid value"
 299         fi
 300         if [ $(devlink_trap_policer_burst_get 1) -ne 16 ]; then
 301                 check_err 1 "Policer burst size was changed to an invalid value"
 302         fi
 303
 304         packets_t0=$(devlink_trap_policer_rx_dropped_get 1)
 305         sleep .5
 306         packets_t1=$(devlink_trap_policer_rx_dropped_get 1)
 307         if [ ! $packets_t1 -gt $packets_t0 ]; then
 308                 check_err 1 "Policer drop counter was not incremented"
 309         fi
 310
 311         echo "y"> $DEBUGFS_DIR/fail_trap_policer_counter_get
 312         devlink -s trap policer show $DEVLINK_DEV policer 1 &> /dev/null
 313         check_fail $? "Managed to read policer drop counter when should not"
 314         echo "n"> $DEBUGFS_DIR/fail_trap_policer_counter_get
 315         devlink -s trap policer show $DEVLINK_DEV policer 1 &> /dev/null
 316         check_err $? "Did not manage to read policer drop counter when should"
 317
 318         log_test "Trap policer"
 319 }
 320
 321 trap_group_check_policer()
 322 {
 323         local group_name=$1; shift
 324
 325         devlink -j -p trap group show $DEVLINK_DEV group $group_name \
 326                 | jq -e '.[][][]["policer"]' &> /dev/null
 327 }
 328
 329 trap_policer_bind_test()
 330 {
 331         devlink trap group set $DEVLINK_DEV group l2_drops policer 1
 332         check_err $? "Failed to bind a valid policer"
 333         if [ $(devlink_trap_group_policer_get "l2_drops") -ne 1 ]; then
 334                 check_err 1 "Bound policer was not changed"
 335         fi
 336
 337         devlink trap group set $DEVLINK_DEV group l2_drops policer 1337 \
 338                 &> /dev/null
 339         check_fail $? "Did not get an error for binding a non-existing policer"
 340         if [ $(devlink_trap_group_policer_get "l2_drops") -ne 1 ]; then
 341                 check_err 1 "Bound policer was changed when should not"
 342         fi
 343
 344         devlink trap group set $DEVLINK_DEV group l2_drops policer 0
 345         check_err $? "Failed to unbind a policer when using ID 0"
 346         trap_group_check_policer "l2_drops"
 347         check_fail $? "Trap group has a policer after unbinding with ID 0"
 348
 349         devlink trap group set $DEVLINK_DEV group l2_drops policer 1
 350         check_err $? "Failed to bind a valid policer"
 351
 352         devlink trap group set $DEVLINK_DEV group l2_drops nopolicer
 353         check_err $? "Failed to unbind a policer when using 'nopolicer' keyword"
 354         trap_group_check_policer "l2_drops"
 355         check_fail $? "Trap group has a policer after unbinding with 'nopolicer' keyword"
 356
 357         devlink trap group set $DEVLINK_DEV group l2_drops policer 1
 358         check_err $? "Failed to bind a valid policer"
 359
 360         echo "y"> $DEBUGFS_DIR/fail_trap_group_set
 361         devlink trap group set $DEVLINK_DEV group l2_drops policer 2 \
 362                 &> /dev/null
 363         check_fail $? "Managed to bind a policer when should not"
 364         echo "n"> $DEBUGFS_DIR/fail_trap_group_set
 365         devlink trap group set $DEVLINK_DEV group l2_drops policer 2
 366         check_err $? "Did not manage to bind a policer when should"
 367
 368         devlink trap group set $DEVLINK_DEV group l2_drops action drop \
 369                 policer 1337 &> /dev/null
 370         check_fail $? "Did not get an error for partially modified trap group"
 371
 372         log_test "Trap policer binding"
 373 }
 374
 375 port_del_test()
 376 {
 377         local group_name
 378         local i
 379
 380         # The test never fails. It is meant to exercise different code paths
 381         # and make sure we properly dismantle a port while packets are
 382         # in-flight.
 383         RET=0
 384
 385         devlink_traps_enable_all
 386
 387         for i in $(seq 1 10); do
 388                 ip link set dev $NETDEV up
 389
 390                 sleep $SLEEP_TIME
 391
 392                 netdevsim_port_destroy
 393                 netdevsim_port_create
 394                 udevadm settle
 395         done
 396
 397         devlink_traps_disable_all
 398
 399         log_test "Port delete"
 400 }
 401
 402 dev_del_test()
 403 {
 404         local group_name
 405         local i
 406
 407         # The test never fails. It is meant to exercise different code paths
 408         # and make sure we properly unregister traps while packets are
 409         # in-flight.
 410         RET=0
 411
 412         devlink_traps_enable_all
 413
 414         for i in $(seq 1 10); do
 415                 ip link set dev $NETDEV up
 416
 417                 sleep $SLEEP_TIME
 418
 419                 cleanup
 420                 setup_prepare
 421         done
 422
 423         devlink_traps_disable_all
 424
 425         log_test "Device delete"
 426 }
 427
 428 netdevsim_dev_create()
 429 {
 430         echo "$DEV_ADDR 0" > ${NETDEVSIM_PATH}/new_device
 431 }
 432
 433 netdevsim_dev_destroy()
 434 {
 435         echo "$DEV_ADDR" > ${NETDEVSIM_PATH}/del_device
 436 }
 437
 438 netdevsim_port_create()
 439 {
 440         echo 1 > ${NETDEVSIM_PATH}/devices/${DEV}/new_port
 441 }
 442
 443 netdevsim_port_destroy()
 444 {
 445         echo 1 > ${NETDEVSIM_PATH}/devices/${DEV}/del_port
 446 }
 447
 448 setup_prepare()
 449 {
 450         local netdev
 451
 452         netdevsim_dev_create
 453
 454         if [ ! -d "${NETDEVSIM_PATH}/devices/${DEV}" ]; then
 455                 echo "Failed to create netdevsim device"
 456                 exit 1
 457         fi
 458
 459         netdevsim_port_create
 460
 461         if [ ! -d "${NETDEVSIM_PATH}/devices/${DEV}/net/" ]; then
 462                 echo "Failed to create netdevsim port"
 463                 exit 1
 464         fi
 465
 466         # Wait for udev to rename newly created netdev.
 467         udevadm settle
 468
 469         NETDEV=$(ls ${NETDEVSIM_PATH}/devices/${DEV}/net/)
 470 }
 471
 472 cleanup()
 473 {
 474         pre_cleanup
 475         netdevsim_port_destroy
 476         netdevsim_dev_destroy
 477 }
 478
 479 trap cleanup EXIT
 480
 481 setup_prepare
 482
 483 tests_run
 484
 485 exit $EXIT_STATUS