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

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
......@@ -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
}
......@@ -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
......
......@@ -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
......
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