Commit 1add9212 authored by Petr Machata's avatar Petr Machata Committed by David S. Miller
Browse files

selftests: mlxsw: RED: Test offload of mirror on RED early_drop qevent 



Add a selftest for offloading a mirror action attached to the block
associated with RED early_drop qevent.

Signed-off-by: default avatarPetr Machata <petrm@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f6668eac

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

+103 −3
Original line number Diff line number Diff line
@@ -121,6 +121,7 @@ h1_destroy() 
h2_create()

{

	host_create $h2 2

	tc qdisc add dev $h2 clsact



	# Some of the tests in this suite use multicast traffic. As this traffic

	# enters BR2_10 resp. BR2_11, it is flooded to all other ports. Thus
@@ -141,6 +142,7 @@ h2_create() 
h2_destroy()

{

	ethtool -s $h2 autoneg on

	tc qdisc del dev $h2 clsact

	host_destroy $h2

}
@@ -336,6 +338,17 @@ get_qdisc_npackets() 
		qdisc_stats_get $swp3 $(get_qdisc_handle $vlan) .packets

}



send_packets()

{

	local vlan=$1; shift

	local proto=$1; shift

	local pkts=$1; shift



	$MZ $h2.$vlan -p 8000 -a own -b $h3_mac \

	    -A $(ipaddr 2 $vlan) -B $(ipaddr 3 $vlan) \

	    -t $proto -q -c $pkts "$@"

}



# This sends traffic in an attempt to build a backlog of $size. Returns 0 on

# success. After 10 failed attempts it bails out and returns 1. It dumps the

# backlog size to stdout.
@@ -364,9 +377,7 @@ build_backlog() 
			return 1

		fi



		$MZ $h2.$vlan -p 8000 -a own -b $h3_mac \

		    -A $(ipaddr 2 $vlan) -B $(ipaddr 3 $vlan) \

		    -t $proto -q -c $pkts "$@"

		send_packets $vlan $proto $pkts "$@"

	done

}
@@ -531,3 +542,92 @@ do_mc_backlog_test() 


	log_test "TC $((vlan - 10)): Qdisc reports MC backlog"

}



do_drop_test()

{

	local vlan=$1; shift

	local limit=$1; shift

	local trigger=$1; shift

	local subtest=$1; shift

	local fetch_counter=$1; shift

	local backlog

	local base

	local now

	local pct



	RET=0



	start_traffic $h1.$vlan $(ipaddr 1 $vlan) $(ipaddr 3 $vlan) $h3_mac



	# Create a bit of a backlog and observe no mirroring due to drops.

	qevent_rule_install_$subtest

	base=$($fetch_counter)



	build_backlog $vlan $((2 * limit / 3)) udp >/dev/null



	busywait 1100 until_counter_is ">= $((base + 1))" $fetch_counter >/dev/null

	check_fail $? "Spurious packets observed without buffer pressure"



	qevent_rule_uninstall_$subtest



	# Push to the queue until it's at the limit. The configured limit is

	# rounded by the qdisc and then by the driver, so this is the best we

	# can do to get to the real limit of the system. Do this with the rules

	# uninstalled so that the inevitable drops don't get counted.

	build_backlog $vlan $((3 * limit / 2)) udp >/dev/null



	qevent_rule_install_$subtest

	base=$($fetch_counter)



	send_packets $vlan udp 11



	now=$(busywait 1100 until_counter_is ">= $((base + 10))" $fetch_counter)

	check_err $? "Dropped packets not observed: 11 expected, $((now - base)) seen"



	# When no extra traffic is injected, there should be no mirroring.

	busywait 1100 until_counter_is ">= $((base + 20))" $fetch_counter >/dev/null

	check_fail $? "Spurious packets observed"



	# When the rule is uninstalled, there should be no mirroring.

	qevent_rule_uninstall_$subtest

	send_packets $vlan udp 11

	busywait 1100 until_counter_is ">= $((base + 20))" $fetch_counter >/dev/null

	check_fail $? "Spurious packets observed after uninstall"



	log_test "TC $((vlan - 10)): ${trigger}ped packets $subtest'd"



	stop_traffic

	sleep 1

}



qevent_rule_install_mirror()

{

	tc filter add block 10 pref 1234 handle 102 matchall skip_sw \

	   action mirred egress mirror dev $swp2 hw_stats disabled

}



qevent_rule_uninstall_mirror()

{

	tc filter del block 10 pref 1234 handle 102 matchall

}



qevent_counter_fetch_mirror()

{

	tc_rule_handle_stats_get "dev $h2 ingress" 101

}



do_drop_mirror_test()

{

	local vlan=$1; shift

	local limit=$1; shift

	local qevent_name=$1; shift



	tc filter add dev $h2 ingress pref 1 handle 101 prot ip \

	   flower skip_sw ip_proto udp \

	   action drop



	do_drop_test "$vlan" "$limit" "$qevent_name" mirror \

		     qevent_counter_fetch_mirror



	tc filter del dev $h2 ingress pref 1 handle 101 flower

}

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

+11 −0
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ ALL_TESTS=" 
	ecn_nodrop_test

	red_test

	mc_backlog_test

	red_mirror_test

"

: ${QDISC:=ets}

source sch_red_core.sh
@@ -83,6 +84,16 @@ mc_backlog_test() 
	uninstall_qdisc

}



red_mirror_test()

{

	install_qdisc qevent early_drop block 10



	do_drop_mirror_test 10 $BACKLOG1 early_drop

	do_drop_mirror_test 11 $BACKLOG2 early_drop



	uninstall_qdisc

}



trap cleanup EXIT



setup_prepare

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

+8 −0
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ ALL_TESTS=" 
	ecn_nodrop_test

	red_test

	mc_backlog_test

	red_mirror_test

"

source sch_red_core.sh
@@ -57,6 +58,13 @@ mc_backlog_test() 
	uninstall_qdisc

}



red_mirror_test()

{

	install_qdisc qevent early_drop block 10

	do_drop_mirror_test 10 $BACKLOG

	uninstall_qdisc

}



trap cleanup EXIT



setup_prepare