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 nomaster
97 ip link set dev $swp1 nomaster
98 ip link del dev br1
99}
100
101setup_prepare()
102{
103 h1=${NETIFS[p1]}
104 swp1=${NETIFS[p2]}
105
106 swp2=${NETIFS[p3]}
107 h2=${NETIFS[p4]}
108
109 vrf_prepare
110
111 h1_create
112 h2_create
113 switch_create
114}
115
116cleanup()
117{
118 pre_cleanup
119
120 switch_destroy
121 h2_destroy
122 h1_destroy
123
124 vrf_cleanup
125}
126
127ping_ipv4()
128{
129 ping_test $h1 192.0.2.2
130}
131
132dscp_ping_test()
133{
134 local vrf_name=$1; shift
135 local sip=$1; shift
136 local dip=$1; shift
137 local prio=$1; shift
138 local dev_10=$1; shift
139 local dev_20=$1; shift
140 local key
141
142 local dscp_10=$(((prio + 10) << 2))
143 local dscp_20=$(((prio + 20) << 2))
144
145 RET=0
146
147 local -A t0s
148 eval "t0s=($(dscp_fetch_stats $dev_10 10)
149 $(dscp_fetch_stats $dev_20 20))"
150
151 local ping_timeout=$((PING_TIMEOUT * 5))
152 ip vrf exec $vrf_name \
153 ${PING} -Q $dscp_10 ${sip:+-I $sip} $dip \
154 -c 10 -i 0.5 -w $ping_timeout &> /dev/null
155
156 local -A t1s
157 eval "t1s=($(dscp_fetch_stats $dev_10 10)
158 $(dscp_fetch_stats $dev_20 20))"
159
160 for key in ${!t0s[@]}; do
161 local expect
162 if ((key == prio+10 || key == prio+20)); then
163 expect=10
164 else
165 expect=0
166 fi
167
168 local delta=$((t1s[$key] - t0s[$key]))
169 ((expect == delta))
170 check_err $? "DSCP $key: Expected to capture $expect packets, got $delta."
171 done
172
173 log_test "DSCP rewrite: $dscp_10-(prio $prio)-$dscp_20"
174}
175
176test_dscp()
177{
178 local prio
179
180 for prio in {0..7}; do
181 dscp_ping_test v$h1 192.0.2.1 192.0.2.2 $prio $h1 $h2
182 done
183}
184
185trap cleanup EXIT
186
187setup_prepare
188setup_wait
189
190tests_run
191
192exit $EXIT_STATUS