tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3
4# Test for DSCP prioritization and rewrite. Packets ingress $swp1 with a DSCP
5# tag and are prioritized according to the map at $swp1. They egress $swp2 and
6# the DSCP value is updated to match the map at that interface. The updated DSCP
7# tag is verified at $h2.
8#
9# ICMP responses are produced with the same DSCP tag that arrived at $h2. They
10# go through prioritization at $swp2 and DSCP retagging at $swp1. The tag is
11# verified at $h1--it should match the original tag.
12#
13# +----------------------+ +----------------------+
14# | H1 | | H2 |
15# | + $h1 | | $h2 + |
16# | | 192.0.2.1/28 | | 192.0.2.2/28 | |
17# +----|-----------------+ +----------------|-----+
18# | |
19# +----|----------------------------------------------------------------|-----+
20# | SW | | |
21# | +-|----------------------------------------------------------------|-+ |
22# | | + $swp1 BR $swp2 + | |
23# | | APP=0,5,10 .. 7,5,17 APP=0,5,20 .. 7,5,27 | |
24# | +--------------------------------------------------------------------+ |
25# +---------------------------------------------------------------------------+
26
27ALL_TESTS="
28 ping_ipv4
29 test_dscp
30"
31
32lib_dir=$(dirname $0)/../../../net/forwarding
33
34NUM_NETIFS=4
35source $lib_dir/lib.sh
36
37h1_create()
38{
39 simple_if_init $h1 192.0.2.1/28
40 tc qdisc add dev $h1 clsact
41 dscp_capture_install $h1 10
42}
43
44h1_destroy()
45{
46 dscp_capture_uninstall $h1 10
47 tc qdisc del dev $h1 clsact
48 simple_if_fini $h1 192.0.2.1/28
49}
50
51h2_create()
52{
53 simple_if_init $h2 192.0.2.2/28
54 tc qdisc add dev $h2 clsact
55 dscp_capture_install $h2 20
56}
57
58h2_destroy()
59{
60 dscp_capture_uninstall $h2 20
61 tc qdisc del dev $h2 clsact
62 simple_if_fini $h2 192.0.2.2/28
63}
64
65dscp_map()
66{
67 local base=$1; shift
68 local prio
69
70 for prio in {0..7}; do
71 echo app=$prio,5,$((base + prio))
72 done
73}
74
75switch_create()
76{
77 ip link add name br1 type bridge vlan_filtering 1
78 ip link set dev br1 up
79 ip link set dev $swp1 master br1
80 ip link set dev $swp1 up
81 ip link set dev $swp2 master br1
82 ip link set dev $swp2 up
83
84 lldptool -T -i $swp1 -V APP $(dscp_map 10) >/dev/null
85 lldptool -T -i $swp2 -V APP $(dscp_map 20) >/dev/null
86 lldpad_app_wait_set $swp1
87 lldpad_app_wait_set $swp2
88}
89
90switch_destroy()
91{
92 lldptool -T -i $swp2 -V APP -d $(dscp_map 20) >/dev/null
93 lldptool -T -i $swp1 -V APP -d $(dscp_map 10) >/dev/null
94 lldpad_app_wait_del
95
96 ip link set dev $swp2 down
97 ip link set dev $swp2 nomaster
98 ip link set dev $swp1 down
99 ip link set dev $swp1 nomaster
100 ip link del dev br1
101}
102
103setup_prepare()
104{
105 h1=${NETIFS[p1]}
106 swp1=${NETIFS[p2]}
107
108 swp2=${NETIFS[p3]}
109 h2=${NETIFS[p4]}
110
111 vrf_prepare
112
113 h1_create
114 h2_create
115 switch_create
116}
117
118cleanup()
119{
120 pre_cleanup
121
122 switch_destroy
123 h2_destroy
124 h1_destroy
125
126 vrf_cleanup
127}
128
129ping_ipv4()
130{
131 ping_test $h1 192.0.2.2
132}
133
134dscp_ping_test()
135{
136 local vrf_name=$1; shift
137 local sip=$1; shift
138 local dip=$1; shift
139 local prio=$1; shift
140 local dev_10=$1; shift
141 local dev_20=$1; shift
142 local key
143
144 local dscp_10=$(((prio + 10) << 2))
145 local dscp_20=$(((prio + 20) << 2))
146
147 RET=0
148
149 local -A t0s
150 eval "t0s=($(dscp_fetch_stats $dev_10 10)
151 $(dscp_fetch_stats $dev_20 20))"
152
153 local ping_timeout=$((PING_TIMEOUT * 5))
154 ip vrf exec $vrf_name \
155 ${PING} -Q $dscp_10 ${sip:+-I $sip} $dip \
156 -c 10 -i 0.5 -w $ping_timeout &> /dev/null
157
158 local -A t1s
159 eval "t1s=($(dscp_fetch_stats $dev_10 10)
160 $(dscp_fetch_stats $dev_20 20))"
161
162 for key in ${!t0s[@]}; do
163 local expect
164 if ((key == prio+10 || key == prio+20)); then
165 expect=10
166 else
167 expect=0
168 fi
169
170 local delta=$((t1s[$key] - t0s[$key]))
171 ((expect == delta))
172 check_err $? "DSCP $key: Expected to capture $expect packets, got $delta."
173 done
174
175 log_test "DSCP rewrite: $dscp_10-(prio $prio)-$dscp_20"
176}
177
178test_dscp()
179{
180 local prio
181
182 for prio in {0..7}; do
183 dscp_ping_test v$h1 192.0.2.1 192.0.2.2 $prio $h1 $h2
184 done
185}
186
187trap cleanup EXIT
188
189setup_prepare
190setup_wait
191
192tests_run
193
194exit $EXIT_STATUS