selftests: mlxsw: Reduce running time using offload indication

After adding a given number of flower rules for different IPv6
addresses, the test generates traffic and ensures that each packet is
received, which is time-consuming.

Instead, test the offload indication of the tc flower rules and reduce
the running time by half.
Signed-off-by: Danielle Ratson <danieller@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tools/testing/selftests/drivers/net/mlxsw/tc_flower_scale.sh

@@ -2,9 +2,9 @@
 # SPDX-License-Identifier: GPL-2.0
 
 # Test for resource limit of offloaded flower rules. The test adds a given
-# number of flower matches for different IPv6 addresses, then generates traffic,
-# and ensures each was hit exactly once. This file contains functions to set up
-# a testing topology and run the test, and is meant to be sourced from a test
+# number of flower matches for different IPv6 addresses, then check the offload
+# indication for all of the tc flower rules. This file contains functions to set
+# up a testing topology and run the test, and is meant to be sourced from a test
 # script that calls the testing routine with a given number of rules.
 
 TC_FLOWER_NUM_NETIFS=2
@@ -94,22 +94,15 @@ __tc_flower_test()
 
 	tc_flower_rules_create $count $should_fail
 
-	for ((i = 0; i < count; ++i)); do
-		$MZ $h1 -q -c 1 -t ip -p 20 -b bc -6 \
-			-A 2001:db8:2::1 \
-			-B $(tc_flower_addr $i)
-	done
-
-	MISMATCHES=$(
-		tc -j -s filter show dev $h2 ingress |
-		jq -r '[ .[] | select(.kind == "flower") | .options |
-		         values as $rule | .actions[].stats.packets |
-		         select(. != 1) | "\(.) on \($rule.keys.dst_ip)" ] |
-		       join(", ")'
-	)
-
-	test -z "$MISMATCHES"
-	check_err $? "Expected to capture 1 packet for each IP, but got $MISMATCHES"
+	offload_count=$(tc -j -s filter show dev $h2 ingress    |
+			jq -r '[ .[] | select(.kind == "flower") |
+			.options | .in_hw ]' | jq .[] | wc -l)
+	[[ $((offload_count - 1)) -eq $count ]]
+	if [[ $should_fail -eq 0 ]]; then
+		check_err $? "Offload mismatch"
+	else
+		check_err_fail $should_fail $? "Offload more than expacted"
+	fi
 }
 
 tc_flower_test()