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|
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
# Test for DSCP prioritization and rewrite. Packets ingress $swp1 with a DSCP
# tag and are prioritized according to the map at $swp1. They egress $swp2 and
# the DSCP value is updated to match the map at that interface. The updated DSCP
# tag is verified at $h2.
#
# ICMP responses are produced with the same DSCP tag that arrived at $h2. They
# go through prioritization at $swp2 and DSCP retagging at $swp1. The tag is
# verified at $h1--it should match the original tag.
#
# +----------------------+ +----------------------+
# | H1 | | H2 |
# | + $h1 | | $h2 + |
# | | 192.0.2.1/28 | | 192.0.2.2/28 | |
# +----|-----------------+ +----------------|-----+
# | |
# +----|----------------------------------------------------------------|-----+
# | SW | | |
# | +-|----------------------------------------------------------------|-+ |
# | | + $swp1 BR $swp2 + | |
# | | APP=0,5,10 .. 7,5,17 APP=0,5,20 .. 7,5,27 | |
# | +--------------------------------------------------------------------+ |
# +---------------------------------------------------------------------------+
ALL_TESTS="
ping_ipv4
test_dscp
"
lib_dir=$(dirname $0)/../../../net/forwarding
NUM_NETIFS=4
source $lib_dir/lib.sh
__dscp_capture_add_del()
{
local add_del=$1; shift
local dev=$1; shift
local base=$1; shift
local dscp;
for prio in {0..7}; do
dscp=$((base + prio))
__icmp_capture_add_del $add_del $dscp "" $dev \
"ip_tos $((dscp << 2))"
done
}
dscp_capture_install()
{
local dev=$1; shift
local base=$1; shift
__dscp_capture_add_del add $dev $base
}
dscp_capture_uninstall()
{
local dev=$1; shift
local base=$1; shift
__dscp_capture_add_del del $dev $base
}
h1_create()
{
local dscp;
simple_if_init $h1 192.0.2.1/28
tc qdisc add dev $h1 clsact
dscp_capture_install $h1 10
}
h1_destroy()
{
dscp_capture_uninstall $h1 10
tc qdisc del dev $h1 clsact
simple_if_fini $h1 192.0.2.1/28
}
h2_create()
{
simple_if_init $h2 192.0.2.2/28
tc qdisc add dev $h2 clsact
dscp_capture_install $h2 20
}
h2_destroy()
{
dscp_capture_uninstall $h2 20
tc qdisc del dev $h2 clsact
simple_if_fini $h2 192.0.2.2/28
}
dscp_map()
{
local base=$1; shift
for prio in {0..7}; do
echo app=$prio,5,$((base + prio))
done
}
lldpad_wait()
{
local dev=$1; shift
while lldptool -t -i $dev -V APP -c app | grep -q pending; do
echo "$dev: waiting for lldpad to push pending APP updates"
sleep 5
done
}
switch_create()
{
ip link add name br1 type bridge vlan_filtering 1
ip link set dev br1 up
ip link set dev $swp1 master br1
ip link set dev $swp1 up
ip link set dev $swp2 master br1
ip link set dev $swp2 up
lldptool -T -i $swp1 -V APP $(dscp_map 10) >/dev/null
lldptool -T -i $swp2 -V APP $(dscp_map 20) >/dev/null
lldpad_wait $swp1
lldpad_wait $swp2
}
switch_destroy()
{
lldptool -T -i $swp2 -V APP -d $(dscp_map 20) >/dev/null
lldptool -T -i $swp1 -V APP -d $(dscp_map 10) >/dev/null
# Give lldpad a chance to push down the changes. If the device is downed
# too soon, the updates will be left pending, but will have been struck
# off the lldpad's DB already, and we won't be able to tell. Then on
# next test iteration this would cause weirdness as newly-added APP
# rules conflict with the old ones, sometimes getting stuck in an
# "unknown" state.
sleep 5
ip link set dev $swp2 nomaster
ip link set dev $swp1 nomaster
ip link del dev br1
}
setup_prepare()
{
h1=${NETIFS[p1]}
swp1=${NETIFS[p2]}
swp2=${NETIFS[p3]}
h2=${NETIFS[p4]}
vrf_prepare
h1_create
h2_create
switch_create
}
cleanup()
{
pre_cleanup
switch_destroy
h2_destroy
h1_destroy
vrf_cleanup
}
dscp_fetch_stats()
{
local dev=$1; shift
local base=$1; shift
for prio in {0..7}; do
local dscp=$((base + prio))
local t=$(tc_rule_stats_get $dev $dscp)
echo "[$dscp]=$t "
done
}
ping_ipv4()
{
ping_test $h1 192.0.2.2
}
dscp_ping_test()
{
local vrf_name=$1; shift
local sip=$1; shift
local dip=$1; shift
local prio=$1; shift
local dev_10=$1; shift
local dev_20=$1; shift
local dscp_10=$(((prio + 10) << 2))
local dscp_20=$(((prio + 20) << 2))
RET=0
local -A t0s
eval "t0s=($(dscp_fetch_stats $dev_10 10)
$(dscp_fetch_stats $dev_20 20))"
ip vrf exec $vrf_name \
${PING} -Q $dscp_10 ${sip:+-I $sip} $dip \
-c 10 -i 0.1 -w 2 &> /dev/null
local -A t1s
eval "t1s=($(dscp_fetch_stats $dev_10 10)
$(dscp_fetch_stats $dev_20 20))"
for key in ${!t0s[@]}; do
local expect
if ((key == prio+10 || key == prio+20)); then
expect=10
else
expect=0
fi
local delta=$((t1s[$key] - t0s[$key]))
((expect == delta))
check_err $? "DSCP $key: Expected to capture $expect packets, got $delta."
done
log_test "DSCP rewrite: $dscp_10-(prio $prio)-$dscp_20"
}
test_dscp()
{
for prio in {0..7}; do
dscp_ping_test v$h1 192.0.2.1 192.0.2.2 $prio $h1 $h2
done
}
trap cleanup EXIT
setup_prepare
setup_wait
tests_run
exit $EXIT_STATUS
|
