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selftests: mlxsw: Add tc sample tests for new triggers

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Test that packets are sampled when tc-sample is used with matchall
egress binding and flower classifier. Verify that when performing
sampling on egress the end-to-end latency is reported as metadata.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2021-03-16 17:03:02 +02:00 committed by David S. Miller
parent 45aad0b704
commit f0b692c4ee
1 changed files with 135 additions and 0 deletions
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135
tools/testing/selftests/drivers/net/mlxsw/tc_sample.sh
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@ -41,6 +41,10 @@ ALL_TESTS="
tc_sample_md_lag_oif_test
tc_sample_md_out_tc_test
tc_sample_md_out_tc_occ_test
tc_sample_md_latency_test
tc_sample_acl_group_conflict_test
tc_sample_acl_rate_test
tc_sample_acl_max_rate_test
"
NUM_NETIFS=8
CAPTURE_FILE=$(mktemp)
@ -482,6 +486,137 @@ tc_sample_md_out_tc_occ_test()
tc filter del dev $rp1 ingress protocol all pref 1 handle 101 matchall
}
tc_sample_md_latency_test()
{
RET=0
# Egress sampling not supported on Spectrum-1.
[[ "$DEVLINK_VIDDID" == "15b3:cb84" ]] && return
tc filter add dev $rp2 egress protocol all pref 1 handle 101 matchall \
skip_sw action sample rate 5 group 1
check_err $? "Failed to configure sampling rule"
psample_capture_start
ip vrf exec v$h1 $MZ $h1 -c 3200 -d 1msec -p 64 -A 192.0.2.1 \
-B 198.51.100.1 -t udp dp=52768,sp=42768 -q
psample_capture_stop
grep -q -e "latency " $CAPTURE_FILE
check_err $? "Sampled packets do not have latency attribute"
log_test "tc sample latency"
tc filter del dev $rp2 egress protocol all pref 1 handle 101 matchall
}
tc_sample_acl_group_conflict_test()
{
RET=0
# Test that two flower sampling rules cannot be configured on the same
# port with different groups.
# Policy-based sampling is not supported on Spectrum-1.
[[ "$DEVLINK_VIDDID" == "15b3:cb84" ]] && return
tc filter add dev $rp1 ingress protocol ip pref 1 handle 101 flower \
skip_sw action sample rate 1024 group 1
check_err $? "Failed to configure sampling rule"
tc filter add dev $rp1 ingress protocol ip pref 2 handle 102 flower \
skip_sw action sample rate 1024 group 1
check_err $? "Failed to configure sampling rule with same group"
tc filter add dev $rp1 ingress protocol ip pref 3 handle 103 flower \
skip_sw action sample rate 1024 group 2 &> /dev/null
check_fail $? "Managed to configure sampling rule with conflicting group"
log_test "tc sample (w/ flower) group conflict test"
tc filter del dev $rp1 ingress protocol ip pref 2 handle 102 flower
tc filter del dev $rp1 ingress protocol ip pref 1 handle 101 flower
}
__tc_sample_acl_rate_test()
{
local bind=$1; shift
local port=$1; shift
local pkts pct
RET=0
# Policy-based sampling is not supported on Spectrum-1.
[[ "$DEVLINK_VIDDID" == "15b3:cb84" ]] && return
tc filter add dev $port $bind protocol ip pref 1 handle 101 flower \
skip_sw dst_ip 198.51.100.1 action sample rate 32 group 1
check_err $? "Failed to configure sampling rule"
psample_capture_start
ip vrf exec v$h1 $MZ $h1 -c 3200 -d 1msec -p 64 -A 192.0.2.1 \
-B 198.51.100.1 -t udp dp=52768,sp=42768 -q
psample_capture_stop
pkts=$(grep -e "group 1 " $CAPTURE_FILE | wc -l)
pct=$((100 * (pkts - 100) / 100))
(( -25 <= pct && pct <= 25))
check_err $? "Expected 100 packets, got $pkts packets, which is $pct% off. Required accuracy is +-25%"
# Setup a filter that should not match any packet and make sure packets
# are not sampled.
tc filter del dev $port $bind protocol ip pref 1 handle 101 flower
tc filter add dev $port $bind protocol ip pref 1 handle 101 flower \
skip_sw dst_ip 198.51.100.10 action sample rate 32 group 1
check_err $? "Failed to configure sampling rule"
psample_capture_start
ip vrf exec v$h1 $MZ $h1 -c 3200 -d 1msec -p 64 -A 192.0.2.1 \
-B 198.51.100.1 -t udp dp=52768,sp=42768 -q
psample_capture_stop
grep -q -e "group 1 " $CAPTURE_FILE
check_fail $? "Sampled packets when should not"
log_test "tc sample (w/ flower) rate ($bind)"
tc filter del dev $port $bind protocol ip pref 1 handle 101 flower
}
tc_sample_acl_rate_test()
{
__tc_sample_acl_rate_test ingress $rp1
__tc_sample_acl_rate_test egress $rp2
}
tc_sample_acl_max_rate_test()
{
RET=0
# Policy-based sampling is not supported on Spectrum-1.
[[ "$DEVLINK_VIDDID" == "15b3:cb84" ]] && return
tc filter add dev $rp1 ingress protocol ip pref 1 handle 101 flower \
skip_sw action sample rate $((2 ** 24 - 1)) group 1
check_err $? "Failed to configure sampling rule with max rate"
tc filter del dev $rp1 ingress protocol ip pref 1 handle 101 flower
tc filter add dev $rp1 ingress protocol ip pref 1 handle 101 flower \
skip_sw action sample rate $((2 ** 24)) \
group 1 &> /dev/null
check_fail $? "Managed to configure sampling rate above maximum"
log_test "tc sample (w/ flower) maximum rate"
}
trap cleanup EXIT
setup_prepare