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         RET=0
 268
 269         if [ $(devlink_trap_policers_num_get) -eq 0 ]; then
 270                 check_err 1 "Failed to dump policers"
 271         fi
 272
 273         devlink trap policer set $DEVLINK_DEV policer 1337 &> /dev/null
 274         check_fail $? "Did not get an error for setting a non-existing policer"
 275         devlink trap policer show $DEVLINK_DEV policer 1337 &> /dev/null
 276         check_fail $? "Did not get an error for getting a non-existing policer"
 277
 278         devlink trap policer set $DEVLINK_DEV policer 1 rate 2000 burst 16
 279         check_err $? "Failed to set valid parameters for a valid policer"
 280         if [ $(devlink_trap_policer_rate_get 1) -ne 2000 ]; then
 281                 check_err 1 "Policer rate was not changed"
 282         fi
 283         if [ $(devlink_trap_policer_burst_get 1) -ne 16 ]; then
 284                 check_err 1 "Policer burst size was not changed"
 285         fi
 286
 287         devlink trap policer set $DEVLINK_DEV policer 1 rate 0 &> /dev/null
 288         check_fail $? "Policer rate was changed to rate lower than limit"
 289         devlink trap policer set $DEVLINK_DEV policer 1 rate 9000 &> /dev/null
 290         check_fail $? "Policer rate was changed to rate higher than limit"
 291         devlink trap policer set $DEVLINK_DEV policer 1 burst 2 &> /dev/null
 292         check_fail $? "Policer burst size was changed to burst size lower than limit"
 293         devlink trap policer set $DEVLINK_DEV policer 1 rate 65537 &> /dev/null
 294         check_fail $? "Policer burst size was changed to burst size higher than limit"
 295         echo "y" > $DEBUGFS_DIR/fail_trap_policer_set
 296         devlink trap policer set $DEVLINK_DEV policer 1 rate 3000 &> /dev/null
 297         check_fail $? "Managed to set policer rate when should not"
 298         echo "n" > $DEBUGFS_DIR/fail_trap_policer_set
 299         if [ $(devlink_trap_policer_rate_get 1) -ne 2000 ]; then
 300                 check_err 1 "Policer rate was changed to an invalid value"
 301         fi
 302         if [ $(devlink_trap_policer_burst_get 1) -ne 16 ]; then
 303                 check_err 1 "Policer burst size was changed to an invalid value"
 304         fi
 305
 306         packets_t0=$(devlink_trap_policer_rx_dropped_get 1)
 307         sleep .5
 308         packets_t1=$(devlink_trap_policer_rx_dropped_get 1)
 309         if [ ! $packets_t1 -gt $packets_t0 ]; then
 310                 check_err 1 "Policer drop counter was not incremented"
 311         fi
 312
 313         echo "y"> $DEBUGFS_DIR/fail_trap_policer_counter_get
 314         devlink -s trap policer show $DEVLINK_DEV policer 1 &> /dev/null
 315         check_fail $? "Managed to read policer drop counter when should not"
 316         echo "n"> $DEBUGFS_DIR/fail_trap_policer_counter_get
 317         devlink -s trap policer show $DEVLINK_DEV policer 1 &> /dev/null
 318         check_err $? "Did not manage to read policer drop counter when should"
 319
 320         log_test "Trap policer"
 321 }
 322
 323 trap_group_check_policer()
 324 {
 325         local group_name=$1; shift
 326
 327         devlink -j -p trap group show $DEVLINK_DEV group $group_name \
 328                 | jq -e '.[][][]["policer"]' &> /dev/null
 329 }
 330
 331 trap_policer_bind_test()
 332 {
 333         RET=0
 334
 335         devlink trap group set $DEVLINK_DEV group l2_drops policer 1
 336         check_err $? "Failed to bind a valid policer"
 337         if [ $(devlink_trap_group_policer_get "l2_drops") -ne 1 ]; then
 338                 check_err 1 "Bound policer was not changed"
 339         fi
 340
 341         devlink trap group set $DEVLINK_DEV group l2_drops policer 1337 \
 342                 &> /dev/null
 343         check_fail $? "Did not get an error for binding a non-existing policer"
 344         if [ $(devlink_trap_group_policer_get "l2_drops") -ne 1 ]; then
 345                 check_err 1 "Bound policer was changed when should not"
 346         fi
 347
 348         devlink trap group set $DEVLINK_DEV group l2_drops policer 0
 349         check_err $? "Failed to unbind a policer when using ID 0"
 350         trap_group_check_policer "l2_drops"
 351         check_fail $? "Trap group has a policer after unbinding with ID 0"
 352
 353         devlink trap group set $DEVLINK_DEV group l2_drops policer 1
 354         check_err $? "Failed to bind a valid policer"
 355
 356         devlink trap group set $DEVLINK_DEV group l2_drops nopolicer
 357         check_err $? "Failed to unbind a policer when using 'nopolicer' keyword"
 358         trap_group_check_policer "l2_drops"
 359         check_fail $? "Trap group has a policer after unbinding with 'nopolicer' keyword"
 360
 361         devlink trap group set $DEVLINK_DEV group l2_drops policer 1
 362         check_err $? "Failed to bind a valid policer"
 363
 364         echo "y"> $DEBUGFS_DIR/fail_trap_group_set
 365         devlink trap group set $DEVLINK_DEV group l2_drops policer 2 \
 366                 &> /dev/null
 367         check_fail $? "Managed to bind a policer when should not"
 368         echo "n"> $DEBUGFS_DIR/fail_trap_group_set
 369         devlink trap group set $DEVLINK_DEV group l2_drops policer 2
 370         check_err $? "Did not manage to bind a policer when should"
 371
 372         devlink trap group set $DEVLINK_DEV group l2_drops action drop \
 373                 policer 1337 &> /dev/null
 374         check_fail $? "Did not get an error for partially modified trap group"
 375
 376         log_test "Trap policer binding"
 377 }
 378
 379 port_del_test()
 380 {
 381         local group_name
 382         local i
 383
 384         # The test never fails. It is meant to exercise different code paths
 385         # and make sure we properly dismantle a port while packets are
 386         # in-flight.
 387         RET=0
 388
 389         devlink_traps_enable_all
 390
 391         for i in $(seq 1 10); do
 392                 ip link set dev $NETDEV up
 393
 394                 sleep $SLEEP_TIME
 395
 396                 netdevsim_port_destroy
 397                 netdevsim_port_create
 398                 udevadm settle
 399         done
 400
 401         devlink_traps_disable_all
 402
 403         log_test "Port delete"
 404 }
 405
 406 dev_del_test()
 407 {
 408         local group_name
 409         local i
 410
 411         # The test never fails. It is meant to exercise different code paths
 412         # and make sure we properly unregister traps while packets are
 413         # in-flight.
 414         RET=0
 415
 416         devlink_traps_enable_all
 417
 418         for i in $(seq 1 10); do
 419                 ip link set dev $NETDEV up
 420
 421                 sleep $SLEEP_TIME
 422
 423                 cleanup
 424                 setup_prepare
 425         done
 426
 427         devlink_traps_disable_all
 428
 429         log_test "Device delete"
 430 }
 431
 432 netdevsim_dev_create()
 433 {
 434         echo "$DEV_ADDR 0" > ${NETDEVSIM_PATH}/new_device
 435 }
 436
 437 netdevsim_dev_destroy()
 438 {
 439         echo "$DEV_ADDR" > ${NETDEVSIM_PATH}/del_device
 440 }
 441
 442 netdevsim_port_create()
 443 {
 444         echo 1 > ${NETDEVSIM_PATH}/devices/${DEV}/new_port
 445 }
 446
 447 netdevsim_port_destroy()
 448 {
 449         echo 1 > ${NETDEVSIM_PATH}/devices/${DEV}/del_port
 450 }
 451
 452 setup_prepare()
 453 {
 454         local netdev
 455
 456         netdevsim_dev_create
 457
 458         if [ ! -d "${NETDEVSIM_PATH}/devices/${DEV}" ]; then
 459                 echo "Failed to create netdevsim device"
 460                 exit 1
 461         fi
 462
 463         netdevsim_port_create
 464
 465         if [ ! -d "${NETDEVSIM_PATH}/devices/${DEV}/net/" ]; then
 466                 echo "Failed to create netdevsim port"
 467                 exit 1
 468         fi
 469
 470         # Wait for udev to rename newly created netdev.
 471         udevadm settle
 472
 473         NETDEV=$(ls ${NETDEVSIM_PATH}/devices/${DEV}/net/)
 474 }
 475
 476 cleanup()
 477 {
 478         pre_cleanup
 479         netdevsim_port_destroy
 480         netdevsim_dev_destroy
 481 }
 482
 483 trap cleanup EXIT
 484
 485 setup_prepare
 486
 487 tests_run
 488
 489 exit $EXIT_STATUS