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selftests: netdevsim: Add test cases for devlink-trap policers 

Add test cases for packet trap policer set / show commands as well as
for the binding of these policers to packet trap groups.

Both good and bad flows are tested for maximum coverage.

v2:
* Add test case with new 'fail_trap_policer_set' knob
* Add test case for partially modified trap group

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2020-03-30 22:38:24 +03:00 committed by David S. Miller
parent 0dc8249a2e
commit 5fbff58e27
2 changed files with 153 additions and 0 deletions
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116
tools/testing/selftests/drivers/net/netdevsim/devlink_trap.sh
View File

@ -16,6 +16,8 @@ ALL_TESTS="
trap_group_action_test
bad_trap_group_test
trap_group_stats_test
trap_policer_test
trap_policer_bind_test
port_del_test
dev_del_test
"
@ -23,6 +25,7 @@ NETDEVSIM_PATH=/sys/bus/netdevsim/
DEV_ADDR=1337
DEV=netdevsim${DEV_ADDR}
DEVLINK_DEV=netdevsim/${DEV}
DEBUGFS_DIR=/sys/kernel/debug/netdevsim/$DEV/
SLEEP_TIME=1
NETDEV=""
NUM_NETIFS=0
@ -256,6 +259,119 @@ trap_group_stats_test()
log_test "Trap group statistics"
}
trap_policer_test()
{
local packets_t0
local packets_t1
if [ $(devlink_trap_policers_num_get) -eq 0 ]; then
check_err 1 "Failed to dump policers"
fi
devlink trap policer set $DEVLINK_DEV policer 1337 &> /dev/null
check_fail $? "Did not get an error for setting a non-existing policer"
devlink trap policer show $DEVLINK_DEV policer 1337 &> /dev/null
check_fail $? "Did not get an error for getting a non-existing policer"
devlink trap policer set $DEVLINK_DEV policer 1 rate 2000 burst 16
check_err $? "Failed to set valid parameters for a valid policer"
if [ $(devlink_trap_policer_rate_get 1) -ne 2000 ]; then
check_err 1 "Policer rate was not changed"
fi
if [ $(devlink_trap_policer_burst_get 1) -ne 16 ]; then
check_err 1 "Policer burst size was not changed"
fi
devlink trap policer set $DEVLINK_DEV policer 1 rate 0 &> /dev/null
check_fail $? "Policer rate was changed to rate lower than limit"
devlink trap policer set $DEVLINK_DEV policer 1 rate 9000 &> /dev/null
check_fail $? "Policer rate was changed to rate higher than limit"
devlink trap policer set $DEVLINK_DEV policer 1 burst 2 &> /dev/null
check_fail $? "Policer burst size was changed to burst size lower than limit"
devlink trap policer set $DEVLINK_DEV policer 1 rate 65537 &> /dev/null
check_fail $? "Policer burst size was changed to burst size higher than limit"
echo "y" > $DEBUGFS_DIR/fail_trap_policer_set
devlink trap policer set $DEVLINK_DEV policer 1 rate 3000 &> /dev/null
check_fail $? "Managed to set policer rate when should not"
echo "n" > $DEBUGFS_DIR/fail_trap_policer_set
if [ $(devlink_trap_policer_rate_get 1) -ne 2000 ]; then
check_err 1 "Policer rate was changed to an invalid value"
fi
if [ $(devlink_trap_policer_burst_get 1) -ne 16 ]; then
check_err 1 "Policer burst size was changed to an invalid value"
fi
packets_t0=$(devlink_trap_policer_rx_dropped_get 1)
sleep .5
packets_t1=$(devlink_trap_policer_rx_dropped_get 1)
if [ ! $packets_t1 -gt $packets_t0 ]; then
check_err 1 "Policer drop counter was not incremented"
fi
echo "y"> $DEBUGFS_DIR/fail_trap_policer_counter_get
devlink -s trap policer show $DEVLINK_DEV policer 1 &> /dev/null
check_fail $? "Managed to read policer drop counter when should not"
echo "n"> $DEBUGFS_DIR/fail_trap_policer_counter_get
devlink -s trap policer show $DEVLINK_DEV policer 1 &> /dev/null
check_err $? "Did not manage to read policer drop counter when should"
log_test "Trap policer"
}
trap_group_check_policer()
{
local group_name=$1; shift
devlink -j -p trap group show $DEVLINK_DEV group $group_name \
| jq -e '.[][][]["policer"]' &> /dev/null
}
trap_policer_bind_test()
{
devlink trap group set $DEVLINK_DEV group l2_drops policer 1
check_err $? "Failed to bind a valid policer"
if [ $(devlink_trap_group_policer_get "l2_drops") -ne 1 ]; then
check_err 1 "Bound policer was not changed"
fi
devlink trap group set $DEVLINK_DEV group l2_drops policer 1337 \
&> /dev/null
check_fail $? "Did not get an error for binding a non-existing policer"
if [ $(devlink_trap_group_policer_get "l2_drops") -ne 1 ]; then
check_err 1 "Bound policer was changed when should not"
fi
devlink trap group set $DEVLINK_DEV group l2_drops policer 0
check_err $? "Failed to unbind a policer when using ID 0"
trap_group_check_policer "l2_drops"
check_fail $? "Trap group has a policer after unbinding with ID 0"
devlink trap group set $DEVLINK_DEV group l2_drops policer 1
check_err $? "Failed to bind a valid policer"
devlink trap group set $DEVLINK_DEV group l2_drops nopolicer
check_err $? "Failed to unbind a policer when using 'nopolicer' keyword"
trap_group_check_policer "l2_drops"
check_fail $? "Trap group has a policer after unbinding with 'nopolicer' keyword"
devlink trap group set $DEVLINK_DEV group l2_drops policer 1
check_err $? "Failed to bind a valid policer"
echo "y"> $DEBUGFS_DIR/fail_trap_group_set
devlink trap group set $DEVLINK_DEV group l2_drops policer 2 \
&> /dev/null
check_fail $? "Managed to bind a policer when should not"
echo "n"> $DEBUGFS_DIR/fail_trap_group_set
devlink trap group set $DEVLINK_DEV group l2_drops policer 2
check_err $? "Did not manage to bind a policer when should"
devlink trap group set $DEVLINK_DEV group l2_drops action drop \
policer 1337 &> /dev/null
check_fail $? "Did not get an error for partially modified trap group"
log_test "Trap policer binding"
}
port_del_test()
{
local group_name

37
tools/testing/selftests/net/forwarding/devlink_lib.sh
View File

@ -420,6 +420,43 @@ devlink_trap_drop_cleanup()
tc filter del dev $dev egress protocol $proto pref $pref handle $handle flower
}
devlink_trap_policers_num_get()
{
devlink -j -p trap policer show | jq '.[]["'$DEVLINK_DEV'"] | length'
}
devlink_trap_policer_rate_get()
{
local policer_id=$1; shift
devlink -j -p trap policer show $DEVLINK_DEV policer $policer_id \
| jq '.[][][]["rate"]'
}
devlink_trap_policer_burst_get()
{
local policer_id=$1; shift
devlink -j -p trap policer show $DEVLINK_DEV policer $policer_id \
| jq '.[][][]["burst"]'
}
devlink_trap_policer_rx_dropped_get()
{
local policer_id=$1; shift
devlink -j -p -s trap policer show $DEVLINK_DEV policer $policer_id \
| jq '.[][][]["stats"]["rx"]["dropped"]'
}
devlink_trap_group_policer_get()
{
local group_name=$1; shift
devlink -j -p trap group show $DEVLINK_DEV group $group_name \
| jq '.[][][]["policer"]'
}
devlink_port_by_netdev()
{
local if_name=$1