summaryrefslogtreecommitdiff
path: root/tools/testing/selftests/drivers/net/mlxsw/qos_dscp_router.sh
blob: c745ce3befeeb30b2f45df66bd3cdb2a2b538b79 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0

# Test for DSCP prioritization in the router.
#
# With ip_forward_update_priority disabled, the packets are expected to keep
# their DSCP (which in this test uses only values 0..7) intact as they are
# forwarded by the switch. That is verified at $h2. ICMP responses are formed
# with the same DSCP as the requests, and likewise pass through the switch
# intact, which is verified at $h1.
#
# With ip_forward_update_priority enabled, router reprioritizes the packets
# according to the table in reprioritize(). Thus, say, DSCP 7 maps to priority
# 4, which on egress maps back to DSCP 4. The response packet then gets
# reprioritized to 6, getting DSCP 6 on egress.
#
# +----------------------+                             +----------------------+
# | H1                   |                             |                   H2 |
# |    + $h1             |                             |            $h2 +     |
# |    | 192.0.2.1/28    |                             |  192.0.2.18/28 |     |
# +----|-----------------+                             +----------------|-----+
#      |                                                                |
# +----|----------------------------------------------------------------|-----+
# | SW |                                                                |     |
# |    + $swp1                                                    $swp2 +     |
# |      192.0.2.2/28                                     192.0.2.17/28       |
# |      APP=0,5,0 .. 7,5,7                          APP=0,5,0 .. 7,5,7       |
# +---------------------------------------------------------------------------+

ALL_TESTS="
	ping_ipv4
	test_update
	test_no_update
	test_dscp_leftover
"

lib_dir=$(dirname $0)/../../../net/forwarding

NUM_NETIFS=4
source $lib_dir/lib.sh

reprioritize()
{
	local in=$1; shift

	# This is based on rt_tos2priority in include/net/route.h. Assuming 1:1
	# mapping between priorities and TOS, it yields a new priority for a
	# packet with ingress priority of $in.
	local -a reprio=(0 0 2 2 6 6 4 4)

	echo ${reprio[$in]}
}

zero()
{
    echo 0
}

h1_create()
{
	simple_if_init $h1 192.0.2.1/28
	tc qdisc add dev $h1 clsact
	dscp_capture_install $h1 0
	ip route add vrf v$h1 192.0.2.16/28 via 192.0.2.2
}

h1_destroy()
{
	ip route del vrf v$h1 192.0.2.16/28 via 192.0.2.2
	dscp_capture_uninstall $h1 0
	tc qdisc del dev $h1 clsact
	simple_if_fini $h1 192.0.2.1/28
}

h2_create()
{
	simple_if_init $h2 192.0.2.18/28
	tc qdisc add dev $h2 clsact
	dscp_capture_install $h2 0
	ip route add vrf v$h2 192.0.2.0/28 via 192.0.2.17
}

h2_destroy()
{
	ip route del vrf v$h2 192.0.2.0/28 via 192.0.2.17
	dscp_capture_uninstall $h2 0
	tc qdisc del dev $h2 clsact
	simple_if_fini $h2 192.0.2.18/28
}

dscp_map()
{
	local base=$1; shift
	local prio

	for prio in {0..7}; do
		echo app=$prio,5,$((base + prio))
	done
}

switch_create()
{
	simple_if_init $swp1 192.0.2.2/28
	__simple_if_init $swp2 v$swp1 192.0.2.17/28

	lldptool -T -i $swp1 -V APP $(dscp_map 0) >/dev/null
	lldptool -T -i $swp2 -V APP $(dscp_map 0) >/dev/null
	lldpad_app_wait_set $swp1
	lldpad_app_wait_set $swp2
}

switch_destroy()
{
	lldptool -T -i $swp2 -V APP -d $(dscp_map 0) >/dev/null
	lldptool -T -i $swp1 -V APP -d $(dscp_map 0) >/dev/null
	lldpad_app_wait_del

	__simple_if_fini $swp2 192.0.2.17/28
	simple_if_fini $swp1 192.0.2.2/28
}

setup_prepare()
{
	h1=${NETIFS[p1]}
	swp1=${NETIFS[p2]}

	swp2=${NETIFS[p3]}
	h2=${NETIFS[p4]}

	vrf_prepare

	sysctl_set net.ipv4.ip_forward_update_priority 1
	h1_create
	h2_create
	switch_create
}

cleanup()
{
	pre_cleanup

	switch_destroy
	h2_destroy
	h1_destroy
	sysctl_restore net.ipv4.ip_forward_update_priority

	vrf_cleanup
}

ping_ipv4()
{
	ping_test $h1 192.0.2.18
}

dscp_ping_test()
{
	local vrf_name=$1; shift
	local sip=$1; shift
	local dip=$1; shift
	local prio=$1; shift
	local reprio=$1; shift
	local dev1=$1; shift
	local dev2=$1; shift
	local i

	local prio2=$($reprio $prio)   # ICMP Request egress prio
	local prio3=$($reprio $prio2)  # ICMP Response egress prio

	local dscp=$((prio << 2))     # ICMP Request ingress DSCP
	local dscp2=$((prio2 << 2))   # ICMP Request egress DSCP
	local dscp3=$((prio3 << 2))   # ICMP Response egress DSCP

	RET=0

	eval "local -A dev1_t0s=($(dscp_fetch_stats $dev1 0))"
	eval "local -A dev2_t0s=($(dscp_fetch_stats $dev2 0))"

	local ping_timeout=$((PING_TIMEOUT * 5))
	ip vrf exec $vrf_name \
	   ${PING} -Q $dscp ${sip:+-I $sip} $dip \
		   -c 10 -i 0.5 -w $ping_timeout &> /dev/null

	eval "local -A dev1_t1s=($(dscp_fetch_stats $dev1 0))"
	eval "local -A dev2_t1s=($(dscp_fetch_stats $dev2 0))"

	for i in {0..7}; do
		local dscpi=$((i << 2))
		local expect2=0
		local expect3=0

		if ((i == prio2)); then
			expect2=10
		fi
		if ((i == prio3)); then
			expect3=10
		fi

		local delta=$((dev2_t1s[$i] - dev2_t0s[$i]))
		((expect2 == delta))
		check_err $? "DSCP $dscpi@$dev2: Expected to capture $expect2 packets, got $delta."

		delta=$((dev1_t1s[$i] - dev1_t0s[$i]))
		((expect3 == delta))
		check_err $? "DSCP $dscpi@$dev1: Expected to capture $expect3 packets, got $delta."
	done

	log_test "DSCP rewrite: $dscp-(prio $prio2)-$dscp2-(prio $prio3)-$dscp3"
}

__test_update()
{
	local update=$1; shift
	local reprio=$1; shift
	local prio

	sysctl_restore net.ipv4.ip_forward_update_priority
	sysctl_set net.ipv4.ip_forward_update_priority $update

	for prio in {0..7}; do
		dscp_ping_test v$h1 192.0.2.1 192.0.2.18 $prio $reprio $h1 $h2
	done
}

test_update()
{
	__test_update 1 reprioritize
}

test_no_update()
{
	__test_update 0 echo
}

# Test that when the last APP rule is removed, the prio->DSCP map is properly
# set to zeroes, and that the last APP rule does not stay active in the ASIC.
test_dscp_leftover()
{
	lldptool -T -i $swp2 -V APP -d $(dscp_map 0) >/dev/null
	lldpad_app_wait_del

	__test_update 0 zero

	lldptool -T -i $swp2 -V APP $(dscp_map 0) >/dev/null
	lldpad_app_wait_set $swp2
}

trap cleanup EXIT

setup_prepare
setup_wait

tests_run

exit $EXIT_STATUS