Quelle  devlink.sh   Sprache: Shell

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0

lib_dir=$(dirname $0)/../../../net/forwarding

ALL_TESTS="fw_flash_test params_test regions_test reload_test \
    netns_reload_test resource_test dev_info_test \
    empty_reporter_test dummy_reporter_test rate_test"
NUM_NETIFS=0
source $lib_dir/lib.sh

BUS_ADDR=10
PORT_COUNT=4
VF_COUNT=4
DEV_NAME=netdevsim$BUS_ADDR
SYSFS_NET_DIR=/sys/bus/netdevsim/devices/$DEV_NAME/net/
DEBUGFS_DIR=/sys/kernel/debug/netdevsim/$DEV_NAME/
DL_HANDLE=netdevsim/$DEV_NAME

wait_for_devlink()
{
 "$@" | grep -q $DL_HANDLE
}

devlink_wait()
{
 local timeout=$1

 busywait "$timeout" wait_for_devlink devlink dev
}

fw_flash_test()
{
 DUMMYFILE=$(find /lib/firmware -type f -printf '%P\n' | head -1)
 RET=0

 if [ -z "$DUMMYFILE" ]
 then
  echo "SKIP: unable to find suitable dummy firmware file"
  return
 fi

 echo "10"> $DEBUGFS_DIR/fw_update_flash_chunk_time_ms

 devlink dev flash $DL_HANDLE file $DUMMYFILE
 check_err $? "Failed to flash with status updates on"

 devlink dev flash $DL_HANDLE file $DUMMYFILE component fw.mgmt
 check_err $? "Failed to flash with component attribute"

 devlink dev flash $DL_HANDLE file $DUMMYFILE overwrite settings
 check_fail $? "Flash with overwrite settings should be rejected"

 echo "1"> $DEBUGFS_DIR/fw_update_overwrite_mask
 check_err $? "Failed to change allowed overwrite mask"

 devlink dev flash $DL_HANDLE file $DUMMYFILE overwrite settings
 check_err $? "Failed to flash with settings overwrite enabled"

 devlink dev flash $DL_HANDLE file $DUMMYFILE overwrite identifiers
 check_fail $? "Flash with overwrite settings should be identifiers"

 echo "3"> $DEBUGFS_DIR/fw_update_overwrite_mask
 check_err $? "Failed to change allowed overwrite mask"

 devlink dev flash $DL_HANDLE file $DUMMYFILE overwrite identifiers overwrite settings
 check_err $? "Failed to flash with settings and identifiers overwrite enabled"

 echo "n"> $DEBUGFS_DIR/fw_update_status
 check_err $? "Failed to disable status updates"

 devlink dev flash $DL_HANDLE file $DUMMYFILE
 check_err $? "Failed to flash with status updates off"

 log_test "fw flash test"
}

param_get()
{
 local name=$1

 cmd_jq "devlink dev param show $DL_HANDLE name $name -j" \
        '.[][][].values[] | select(.cmode == "driverinit").value'
}

param_set()
{
 local name=$1
 local value=$2

 devlink dev param set $DL_HANDLE name $name cmode driverinit value $value
}

check_value()
{
 local name=$1
 local phase_name=$2
 local expected_param_value=$3
 local expected_debugfs_value=$4
 local value

 value=$(param_get $name)
 check_err $? "Failed to get $name param value"
 [ "$value" == "$expected_param_value" ]
 check_err $? "Unexpected $phase_name $name param value"
 value=$(<$DEBUGFS_DIR/$name)
 check_err $? "Failed to get $name debugfs value"
 [ "$value" == "$expected_debugfs_value" ]
 check_err $? "Unexpected $phase_name $name debugfs value"
}

params_test()
{
 RET=0

 local max_macs
 local test1

 check_value max_macs initial 32 32
 check_value test1 initial true Y

 param_set max_macs 16
 check_err $? "Failed to set max_macs param value"
 param_set test1 false
 check_err $? "Failed to set test1 param value"

 check_value max_macs post-set 16 32
 check_value test1 post-set false Y

 devlink dev reload $DL_HANDLE

 check_value max_macs post-reload 16 16
 check_value test1 post-reload false N

 log_test "params test"
}

check_region_size()
{
 local name=$1
 local size

 size=$(devlink region show $DL_HANDLE/$name -j | jq -e -r '.[][].size')
 check_err $? "Failed to get $name region size"
 [ $size -eq 32768 ]
 check_err $? "Invalid $name region size"
}

check_region_snapshot_count()
{
 local name=$1
 local phase_name=$2
 local expected_count=$3
 local count

 count=$(devlink region show $DL_HANDLE/$name -j | jq -e -r '.[][].snapshot | length')
 [ $count -eq $expected_count ]
 check_err $? "Unexpected $phase_name snapshot count"
}

regions_test()
{
 RET=0

 local count

 check_region_size dummy
 check_region_snapshot_count dummy initial 0

 echo ""> $DEBUGFS_DIR/take_snapshot
 check_err $? "Failed to take first dummy region snapshot"
 check_region_snapshot_count dummy post-first-snapshot 1

 echo ""> $DEBUGFS_DIR/take_snapshot
 check_err $? "Failed to take second dummy region snapshot"
 check_region_snapshot_count dummy post-second-snapshot 2

 echo ""> $DEBUGFS_DIR/take_snapshot
 check_err $? "Failed to take third dummy region snapshot"
 check_region_snapshot_count dummy post-third-snapshot 3

 devlink region del $DL_HANDLE/dummy snapshot 1
 check_err $? "Failed to delete first dummy region snapshot"

 check_region_snapshot_count dummy post-first-delete 2

 devlink region new $DL_HANDLE/dummy snapshot 25
 check_err $? "Failed to create a new snapshot with id 25"

 check_region_snapshot_count dummy post-first-request 3

 devlink region dump $DL_HANDLE/dummy snapshot 25 >> /dev/null
 check_err $? "Failed to dump snapshot with id 25"

 devlink region read $DL_HANDLE/dummy snapshot 25 addr 0 len 1 >> /dev/null
 check_err $? "Failed to read snapshot with id 25 (1 byte)"

 devlink region read $DL_HANDLE/dummy snapshot 25 addr 128 len 128 >> /dev/null
 check_err $? "Failed to read snapshot with id 25 (128 bytes)"

 devlink region read $DL_HANDLE/dummy snapshot 25 addr 128 len $((1<<32)) >> /dev/null
 check_err $? "Failed to read snapshot with id 25 (oversized)"

 devlink region read $DL_HANDLE/dummy snapshot 25 addr $((1<<32)) len 128 >> /dev/null 2>&1
 check_fail $? "Bad read of snapshot with id 25 did not fail"

 devlink region del $DL_HANDLE/dummy snapshot 25
 check_err $? "Failed to delete snapshot with id 25"

 check_region_snapshot_count dummy post-second-delete 2

 sid=$(devlink -j region new $DL_HANDLE/dummy | jq '.[][][][]')
 check_err $? "Failed to create a new snapshot with id allocated by the kernel"

 check_region_snapshot_count dummy post-first-request 3

 devlink region dump $DL_HANDLE/dummy snapshot $sid >> /dev/null
 check_err $? "Failed to dump a snapshot with id allocated by the kernel"

 devlink region del $DL_HANDLE/dummy snapshot $sid
 check_err $? "Failed to delete snapshot with id allocated by the kernel"

 check_region_snapshot_count dummy post-first-request 2

 log_test "regions test"
}

reload_test()
{
 RET=0

 devlink dev reload $DL_HANDLE
 check_err $? "Failed to reload"

 echo "y"> $DEBUGFS_DIR/fail_reload
 check_err $? "Failed to setup devlink reload to fail"

 devlink dev reload $DL_HANDLE
 check_fail $? "Unexpected success of devlink reload"

 echo "n"> $DEBUGFS_DIR/fail_reload
 check_err $? "Failed to setup devlink reload not to fail"

 devlink dev reload $DL_HANDLE
 check_err $? "Failed to reload after set not to fail"

 echo "y"> $DEBUGFS_DIR/dont_allow_reload
 check_err $? "Failed to forbid devlink reload"

 devlink dev reload $DL_HANDLE
 check_fail $? "Unexpected success of devlink reload"

 echo "n"> $DEBUGFS_DIR/dont_allow_reload
 check_err $? "Failed to re-enable devlink reload"

 devlink dev reload $DL_HANDLE
 check_err $? "Failed to reload after re-enable"

 log_test "reload test"
}

netns_reload_test()
{
 RET=0

 ip netns add testns1
 check_err $? "Failed add netns \"testns1\""
 ip netns add testns2
 check_err $? "Failed add netns \"testns2\""

 devlink dev reload $DL_HANDLE netns testns1
 check_err $? "Failed to reload into netns \"testns1\""

 devlink -N testns1 dev reload $DL_HANDLE netns testns2
 check_err $? "Failed to reload from netns \"testns1\" into netns \"testns2\""

 ip netns del testns2
 ip netns del testns1

 # Wait until netns async cleanup is done.
 devlink_wait 2000

 log_test "netns reload test"
}

DUMMYDEV="dummytest"

res_val_get()
{
 local netns=$1
 local parentname=$2
 local name=$3
 local type=$4

 cmd_jq "devlink -N $netns resource show $DL_HANDLE -j" \
        ".[][][] | select(.name == \"$parentname\").resources[] \
         | select(.name == \"$name\").$type"
}

resource_test()
{
 RET=0

 ip netns add testns1
 check_err $? "Failed add netns \"testns1\""
 ip netns add testns2
 check_err $? "Failed add netns \"testns2\""

 devlink dev reload $DL_HANDLE netns testns1
 check_err $? "Failed to reload into netns \"testns1\""

 # Create dummy dev to add the address and routes on.

 ip -n testns1 link add name $DUMMYDEV type dummy
 check_err $? "Failed create dummy device"
 ip -n testns1 link set $DUMMYDEV up
 check_err $? "Failed bring up dummy device"
 ip -n testns1 a a 192.0.1.1/24 dev $DUMMYDEV
 check_err $? "Failed add an IP address to dummy device"

 local occ=$(res_val_get testns1 IPv4 fib occ)
 local limit=$((occ+1))

 # Set fib size limit to handle one another route only.

 devlink -N testns1 resource set $DL_HANDLE path IPv4/fib size $limit
 check_err $? "Failed to set IPv4/fib resource size"
 local size_new=$(res_val_get testns1 IPv4 fib size_new)
 [ "$size_new" -eq "$limit" ]
 check_err $? "Unexpected \"size_new\" value (got $size_new, expected $limit)"

 devlink -N testns1 dev reload $DL_HANDLE
 check_err $? "Failed to reload"
 local size=$(res_val_get testns1 IPv4 fib size)
 [ "$size" -eq "$limit" ]
 check_err $? "Unexpected \"size\" value (got $size, expected $limit)"

 # Insert 2 routes, the first is going to be inserted,
 # the second is expected to fail to be inserted.

 ip -n testns1 r a 192.0.2.0/24 via 192.0.1.2
 check_err $? "Failed to add route"

 ip -n testns1 r a 192.0.3.0/24 via 192.0.1.2
 check_fail $? "Unexpected successful route add over limit"

 # Now create another dummy in second network namespace and
 # insert two routes. That is over the limit of the netdevsim
 # instance in the first namespace. Move the netdevsim instance
 # into the second namespace and expect it to fail.

 ip -n testns2 link add name $DUMMYDEV type dummy
 check_err $? "Failed create dummy device"
 ip -n testns2 link set $DUMMYDEV up
 check_err $? "Failed bring up dummy device"
 ip -n testns2 a a 192.0.1.1/24 dev $DUMMYDEV
 check_err $? "Failed add an IP address to dummy device"
 ip -n testns2 r a 192.0.2.0/24 via 192.0.1.2
 check_err $? "Failed to add route"
 ip -n testns2 r a 192.0.3.0/24 via 192.0.1.2
 check_err $? "Failed to add route"

 devlink -N testns1 dev reload $DL_HANDLE netns testns2
 check_fail $? "Unexpected successful reload from netns \"testns1\" into netns \"testns2\""

 devlink -N testns2 resource set $DL_HANDLE path IPv4/fib size ' -1'
 check_err $? "Failed to reset IPv4/fib resource size"

 devlink -N testns2 dev reload $DL_HANDLE netns 1
 check_err $? "Failed to reload devlink back"

 ip netns del testns2
 ip netns del testns1

 # Wait until netns async cleanup is done.
 devlink_wait 2000

 log_test "resource test"
}

info_get()
{
 local name=$1

 cmd_jq "devlink dev info $DL_HANDLE -j" ".[][][\"$name\"]" "-e"
}

dev_info_test()
{
 RET=0

 driver=$(info_get "driver")
 check_err $? "Failed to get driver name"
 [ "$driver" == "netdevsim" ]
 check_err $? "Unexpected driver name $driver"

 log_test "dev_info test"
}

empty_reporter_test()
{
 RET=0

 devlink health show $DL_HANDLE reporter empty >/dev/null
 check_err $? "Failed show empty reporter"

 devlink health dump show $DL_HANDLE reporter empty >/dev/null
 check_err $? "Failed show dump of empty reporter"

 devlink health diagnose $DL_HANDLE reporter empty >/dev/null
 check_err $? "Failed diagnose empty reporter"

 devlink health recover $DL_HANDLE reporter empty
 check_err $? "Failed recover empty reporter"

 log_test "empty reporter test"
}

check_reporter_info()
{
 local name=$1
 local expected_state=$2
 local expected_error=$3
 local expected_recover=$4
 local expected_grace_period=$5
 local expected_auto_recover=$6

 local show=$(devlink health show $DL_HANDLE reporter $name -j | jq -e -r ".[][][]")
 check_err $? "Failed show $name reporter"

 local state=$(echo $show | jq -r ".state")
 [ "$state" == "$expected_state" ]
 check_err $? "Unexpected \"state\" value (got $state, expected $expected_state)"

 local error=$(echo $show | jq -r ".error")
 [ "$error" == "$expected_error" ]
 check_err $? "Unexpected \"error\" value (got $error, expected $expected_error)"

 local recover=`echo $show | jq -r ".recover"`
 [ "$recover" == "$expected_recover" ]
 check_err $? "Unexpected \"recover\" value (got $recover, expected $expected_recover)"

 local grace_period=$(echo $show | jq -r ".grace_period")
 check_err $? "Failed get $name reporter grace_period"
 [ "$grace_period" == "$expected_grace_period" ]
 check_err $? "Unexpected \"grace_period\" value (got $grace_period, expected $expected_grace_period)"

 local auto_recover=$(echo $show | jq -r ".auto_recover")
 [ "$auto_recover" == "$expected_auto_recover" ]
 check_err $? "Unexpected \"auto_recover\" value (got $auto_recover, expected $expected_auto_recover)"
}

dummy_reporter_test()
{
 RET=0

 check_reporter_info dummy healthy 0 0 0 true

 devlink health set $DL_HANDLE reporter dummy auto_recover false
 check_err $? "Failed to dummy reporter auto_recover option"

 check_reporter_info dummy healthy 0 0 0 false

 local BREAK_MSG="foo bar"
 echo "$BREAK_MSG"> $DEBUGFS_DIR/health/break_health
 check_err $? "Failed to break dummy reporter"

 check_reporter_info dummy error 1 0 0 false

 local dump=$(devlink health dump show $DL_HANDLE reporter dummy -j)
 check_err $? "Failed show dump of dummy reporter"

 local dump_break_msg=$(echo $dump | jq -r ".break_message")
 [ "$dump_break_msg" == "$BREAK_MSG" ]
 check_err $? "Unexpected dump break message value (got $dump_break_msg, expected $BREAK_MSG)"

 devlink health dump clear $DL_HANDLE reporter dummy
 check_err $? "Failed clear dump of dummy reporter"

 devlink health recover $DL_HANDLE reporter dummy
 check_err $? "Failed recover dummy reporter"

 check_reporter_info dummy healthy 1 1 0 false

 devlink health set $DL_HANDLE reporter dummy auto_recover true
 check_err $? "Failed to dummy reporter auto_recover option"

 check_reporter_info dummy healthy 1 1 0 true

 echo "$BREAK_MSG"> $DEBUGFS_DIR/health/break_health
 check_err $? "Failed to break dummy reporter"

 check_reporter_info dummy healthy 2 2 0 true

 local diagnose=$(devlink health diagnose $DL_HANDLE reporter dummy -j -p)
 check_err $? "Failed show diagnose of dummy reporter"

 local rcvrd_break_msg=$(echo $diagnose | jq -r ".recovered_break_message")
 [ "$rcvrd_break_msg" == "$BREAK_MSG" ]
 check_err $? "Unexpected recovered break message value (got $rcvrd_break_msg, expected $BREAK_MSG)"

 devlink health set $DL_HANDLE reporter dummy grace_period 10
 check_err $? "Failed to dummy reporter grace_period option"

 check_reporter_info dummy healthy 2 2 10 true

 echo "Y"> $DEBUGFS_DIR/health/fail_recover
 check_err $? "Failed set dummy reporter recovery to fail"

 echo "$BREAK_MSG"> $DEBUGFS_DIR/health/break_health
 check_fail $? "Unexpected success of dummy reporter break"

 check_reporter_info dummy error 3 2 10 true

 devlink health recover $DL_HANDLE reporter dummy
 check_fail $? "Unexpected success of dummy reporter recover"

 echo "N"> $DEBUGFS_DIR/health/fail_recover
 check_err $? "Failed set dummy reporter recovery to be successful"

 devlink health recover $DL_HANDLE reporter dummy
 check_err $? "Failed recover dummy reporter"

 check_reporter_info dummy healthy 3 3 10 true

 echo 8192 > $DEBUGFS_DIR/health/binary_len
 check_err $? "Failed set dummy reporter binary len to 8192"

 local dump=$(devlink health dump show $DL_HANDLE reporter dummy -j)
 check_err $? "Failed show dump of dummy reporter"

 devlink health dump clear $DL_HANDLE reporter dummy
 check_err $? "Failed clear dump of dummy reporter"

 log_test "dummy reporter test"
}

rate_leafs_get()
{
 local handle=$1

 cmd_jq "devlink port function rate show -j" \
        '.[] | to_entries | .[] | select(.value.type == "leaf") | .key | select(contains("'$handle'"))'
}

rate_nodes_get()
{
 local handle=$1

 cmd_jq "devlink port function rate show -j" \
  '.[] | to_entries | .[] | select(.value.type == "node") | .key | select(contains("'$handle'"))'
}

rate_attr_set()
{
 local handle=$1
 local name=$2
 local value=$3
 local units=$4

 devlink port function rate set $handle $name $value$units
}

rate_attr_get()
{
 local handle=$1
 local name=$2

 cmd_jq "devlink port function rate show $handle -j" '.[][].'$name
}

rate_attr_tx_rate_check()
{
 local handle=$1
 local name=$2
 local rate=$3
 local debug_file=$4

 rate_attr_set $handle $name $rate mbit
 check_err $? "Failed to set $name value"

 local debug_value=$(cat $debug_file)
 check_err $? "Failed to read $name value from debugfs"
 [ "$debug_value" == "$rate" ]
 check_err $? "Unexpected $name debug value $debug_value != $rate"

 local api_value=$(( $(rate_attr_get $handle $name) * 8 / 1000000 ))
 check_err $? "Failed to get $name attr value"
 [ "$api_value" == "$rate" ]
 check_err $? "Unexpected $name attr value $api_value != $rate"
}

rate_attr_parent_check()
{
 local handle=$1
 local parent=$2
 local debug_file=$3

 rate_attr_set $handle parent $parent
 check_err $? "Failed to set parent"

 debug_value=$(cat $debug_file)
 check_err $? "Failed to get parent debugfs value"
 [ "$debug_value" == "$parent" ]
 check_err $? "Unexpected parent debug value $debug_value != $parent"

 api_value=$(rate_attr_get $r_obj parent)
 check_err $? "Failed to get parent attr value"
 [ "$api_value" == "$parent" ]
 check_err $? "Unexpected parent attr value $api_value != $parent"
}

rate_attr_tc_bw_check()
{
 local handle=$1
 local tc_bw=$2
 local debug_file=$3

 local tc_bw_str=""
 for bw in $tc_bw; do
  local tc=${bw%%:*}
  local value=${bw##*:}
  tc_bw_str="$tc_bw_str $tc:$value"
 done
 tc_bw_str=${tc_bw_str# }

 rate_attr_set "$handle" tc-bw "$tc_bw_str"
 check_err $? "Failed to set tc-bw values"

 for bw in $tc_bw; do
  local tc=${bw%%:*}
  local value=${bw##*:}
  local debug_value
  debug_value=$(cat "$debug_file"/tc"${tc}"_bw)
  check_err $? "Failed to read tc-bw value from debugfs for tc$tc"
  [ "$debug_value" == "$value" ]
  check_err $? "Unexpected tc-bw debug value for tc$tc: $debug_value != $value"
 done

 for bw in $tc_bw; do
  local tc=${bw%%:*}
  local expected_value=${bw##*:}
  local api_value
  api_value=$(rate_attr_get "$handle" tc_"$tc")
  if [ "$api_value" = "null" ]; then
   api_value=0
  fi
  [ "$api_value" == "$expected_value" ]
  check_err $? "Unexpected tc-bw value for tc$tc: $api_value != $expected_value"
 done
}

rate_node_add()
{
 local handle=$1

 devlink port function rate add $handle
}

rate_node_del()
{
 local handle=$1

 devlink port function rate del $handle
}

rate_test()
{
 RET=0

 echo $VF_COUNT > /sys/bus/netdevsim/devices/$DEV_NAME/sriov_numvfs
 devlink dev eswitch set $DL_HANDLE mode switchdev
 local leafs=`rate_leafs_get $DL_HANDLE`
 local num_leafs=`echo $leafs | wc -w`
 [ "$num_leafs" == "$VF_COUNT" ]
 check_err $? "Expected $VF_COUNT rate leafs but got $num_leafs"

 rate=10
 for r_obj in $leafs
 do
  rate_attr_tx_rate_check $r_obj tx_share $rate \
   $DEBUGFS_DIR/ports/${r_obj##*/}/tx_share
  rate=$(($rate+10))
 done

 rate=100
 for r_obj in $leafs
 do
  rate_attr_tx_rate_check $r_obj tx_max $rate \
   $DEBUGFS_DIR/ports/${r_obj##*/}/tx_max
  rate=$(($rate+100))
 done

 local tc_bw="0:0 1:40 2:0 3:0 4:0 5:0 6:60 7:0"
 for r_obj in $leafs
 do
  rate_attr_tc_bw_check "$r_obj" "$tc_bw" \
   "$DEBUGFS_DIR"/ports/"${r_obj##*/}"
 done

 local node1_name='group1'
 local node1="$DL_HANDLE/$node1_name"
 rate_node_add "$node1"
 check_err $? "Failed to add node $node1"

 local num_nodes=`rate_nodes_get $DL_HANDLE | wc -w`
 [ $num_nodes == 1 ]
 check_err $? "Expected 1 rate node in output but got $num_nodes"

 local node_tx_share=10
 rate_attr_tx_rate_check $node1 tx_share $node_tx_share \
  $DEBUGFS_DIR/rate_nodes/${node1##*/}/tx_share

 local node_tx_max=100
 rate_attr_tx_rate_check $node1 tx_max $node_tx_max \
  $DEBUGFS_DIR/rate_nodes/${node1##*/}/tx_max


 local tc_bw="0:20 1:0 2:0 3:0 4:0 5:20 6:60 7:0"
 rate_attr_tc_bw_check $node1 "$tc_bw" \
  "$DEBUGFS_DIR"/rate_nodes/"${node1##*/}"


 rate_node_del "$node1"
 check_err $? "Failed to delete node $node1"
 local num_nodes=`rate_nodes_get $DL_HANDLE | wc -w`
 [ $num_nodes == 0 ]
 check_err $? "Expected 0 rate node but got $num_nodes"

 local node1_name='group1'
 local node1="$DL_HANDLE/$node1_name"
 rate_node_add "$node1"
 check_err $? "Failed to add node $node1"

 rate_attr_parent_check $r_obj $node1_name \
  $DEBUGFS_DIR/ports/${r_obj##*/}/rate_parent

 local node2_name='group2'
 local node2="$DL_HANDLE/$node2_name"
 rate_node_add "$node2"
 check_err $? "Failed to add node $node2"

 rate_attr_parent_check $node2 $node1_name \
  $DEBUGFS_DIR/rate_nodes/$node2_name/rate_parent
 rate_node_del "$node2"
 check_err $? "Failed to delete node $node2"
 rate_attr_set "$r_obj" noparent
 check_err $? "Failed to unset $r_obj parent node"
 rate_node_del "$node1"
 check_err $? "Failed to delete node $node1"

 log_test "rate test"
}

setup_prepare()
{
 modprobe netdevsim
 echo "$BUS_ADDR $PORT_COUNT" > /sys/bus/netdevsim/new_device
 while [ ! -d $SYSFS_NET_DIR ] ; do :; done
}

cleanup()
{
 pre_cleanup
 echo "$BUS_ADDR" > /sys/bus/netdevsim/del_device
 modprobe -r netdevsim
}

trap cleanup EXIT

setup_prepare

tests_run

exit $EXIT_STATUS