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 $swp2 + | |
23 # | | dcb dscp-prio 10:0...17:7 dcb dscp-prio 20:0...27:7 | |
24 # | +--------------------------------------------------------------------+ |
25 # +---------------------------------------------------------------------------+
26
27 ALL_TESTS="
28 ping_ipv4
29 test_dscp
30 "
31
32 lib_dir=$(dirname $0)/../../../net/forwarding
33
34 NUM_NETIFS=4
35 source $lib_dir/lib.sh
36
37 h1_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
44 h1_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
51 h2_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
58 h2_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
65 switch_create()
66 {
67 ip link add name br1 type bridge vlan_filtering 1
68 ip link set dev br1 addrgenmode none
69 ip link set dev br1 up
70 ip link set dev $swp1 master br1
71 ip link set dev $swp1 up
72 ip link set dev $swp2 master br1
73 ip link set dev $swp2 up
74
75 dcb app add dev $swp1 dscp-prio 10:0 11:1 12:2 13:3 14:4 15:5 16:6 17:7
76 dcb app add dev $swp2 dscp-prio 20:0 21:1 22:2 23:3 24:4 25:5 26:6 27:7
77 }
78
79 switch_destroy()
80 {
81 dcb app del dev $swp2 dscp-prio 20:0 21:1 22:2 23:3 24:4 25:5 26:6 27:7
82 dcb app del dev $swp1 dscp-prio 10:0 11:1 12:2 13:3 14:4 15:5 16:6 17:7
83
84 ip link set dev $swp2 down
85 ip link set dev $swp2 nomaster
86 ip link set dev $swp1 down
87 ip link set dev $swp1 nomaster
88 ip link del dev br1
89 }
90
91 setup_prepare()
92 {
93 h1=${NETIFS[p1]}
94 swp1=${NETIFS[p2]}
95
96 swp2=${NETIFS[p3]}
97 h2=${NETIFS[p4]}
98
99 vrf_prepare
100
101 h1_create
102 h2_create
103 switch_create
104 }
105
106 cleanup()
107 {
108 pre_cleanup
109
110 switch_destroy
111 h2_destroy
112 h1_destroy
113
114 vrf_cleanup
115 }
116
117 ping_ipv4()
118 {
119 ping_test $h1 192.0.2.2
120 }
121
122 dscp_ping_test()
123 {
124 local vrf_name=$1; shift
125 local sip=$1; shift
126 local dip=$1; shift
127 local prio=$1; shift
128 local dev_10=$1; shift
129 local dev_20=$1; shift
130 local key
131
132 local dscp_10=$(((prio + 10) << 2))
133 local dscp_20=$(((prio + 20) << 2))
134
135 RET=0
136
137 local -A t0s
138 eval "t0s=($(dscp_fetch_stats $dev_10 10)
139 $(dscp_fetch_stats $dev_20 20))"
140
141 local ping_timeout=$((PING_TIMEOUT * 5))
142 ip vrf exec $vrf_name \
143 ${PING} -Q $dscp_10 ${sip:+-I $sip} $dip \
144 -c 10 -i 0.5 -w $ping_timeout &> /dev/null
145
146 local -A t1s
147 eval "t1s=($(dscp_fetch_stats $dev_10 10)
148 $(dscp_fetch_stats $dev_20 20))"
149
150 for key in ${!t0s[@]}; do
151 local expect
152 if ((key == prio+10 || key == prio+20)); then
153 expect=10
154 else
155 expect=0
156 fi
157
158 local delta=$((t1s[$key] - t0s[$key]))
159 ((expect == delta))
160 check_err $? "DSCP $key: Expected to capture $expect packets, got $delta."
161 done
162
163 log_test "DSCP rewrite: $dscp_10-(prio $prio)-$dscp_20"
164 }
165
166 test_dscp()
167 {
168 local prio
169
170 for prio in {0..7}; do
171 dscp_ping_test v$h1 192.0.2.1 192.0.2.2 $prio $h1 $h2
172 done
173 }
174
175 trap cleanup EXIT
176
177 setup_prepare
178 setup_wait
179
180 tests_run
181
182 exit $EXIT_STATUS
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