Commit | Line | Data |
---|---|---|
a3f74617 | 1 | #!/bin/bash |
b2441318 | 2 | # SPDX-License-Identifier: GPL-2.0 |
a3f74617 MKL |
3 | |
4 | MY_DIR=$(dirname $0) | |
5 | # Details on the bpf prog | |
6 | BPF_CGRP2_ARRAY_NAME='test_cgrp2_array_pin' | |
7 | BPF_PROG="$MY_DIR/test_cgrp2_tc_kern.o" | |
8 | BPF_SECTION='filter' | |
9 | ||
10 | [ -z "$TC" ] && TC='tc' | |
11 | [ -z "$IP" ] && IP='ip' | |
12 | ||
13 | # Names of the veth interface, net namespace...etc. | |
14 | HOST_IFC='ve' | |
15 | NS_IFC='vens' | |
16 | NS='ns' | |
17 | ||
18 | find_mnt() { | |
19 | cat /proc/mounts | \ | |
20 | awk '{ if ($3 == "'$1'" && mnt == "") { mnt = $2 }} END { print mnt }' | |
21 | } | |
22 | ||
23 | # Init cgroup2 vars | |
24 | init_cgrp2_vars() { | |
25 | CGRP2_ROOT=$(find_mnt cgroup2) | |
26 | if [ -z "$CGRP2_ROOT" ] | |
27 | then | |
28 | CGRP2_ROOT='/mnt/cgroup2' | |
29 | MOUNT_CGRP2="yes" | |
30 | fi | |
31 | CGRP2_TC="$CGRP2_ROOT/tc" | |
32 | CGRP2_TC_LEAF="$CGRP2_TC/leaf" | |
33 | } | |
34 | ||
35 | # Init bpf fs vars | |
36 | init_bpf_fs_vars() { | |
37 | local bpf_fs_root=$(find_mnt bpf) | |
38 | [ -n "$bpf_fs_root" ] || return -1 | |
39 | BPF_FS_TC_SHARE="$bpf_fs_root/tc/globals" | |
40 | } | |
41 | ||
42 | setup_cgrp2() { | |
43 | case $1 in | |
44 | start) | |
45 | if [ "$MOUNT_CGRP2" == 'yes' ] | |
46 | then | |
47 | [ -d $CGRP2_ROOT ] || mkdir -p $CGRP2_ROOT | |
48 | mount -t cgroup2 none $CGRP2_ROOT || return $? | |
49 | fi | |
50 | mkdir -p $CGRP2_TC_LEAF | |
51 | ;; | |
52 | *) | |
53 | rmdir $CGRP2_TC_LEAF && rmdir $CGRP2_TC | |
54 | [ "$MOUNT_CGRP2" == 'yes' ] && umount $CGRP2_ROOT | |
55 | ;; | |
56 | esac | |
57 | } | |
58 | ||
59 | setup_bpf_cgrp2_array() { | |
60 | local bpf_cgrp2_array="$BPF_FS_TC_SHARE/$BPF_CGRP2_ARRAY_NAME" | |
61 | case $1 in | |
62 | start) | |
63 | $MY_DIR/test_cgrp2_array_pin -U $bpf_cgrp2_array -v $CGRP2_TC | |
64 | ;; | |
65 | *) | |
66 | [ -d "$BPF_FS_TC_SHARE" ] && rm -f $bpf_cgrp2_array | |
67 | ;; | |
68 | esac | |
69 | } | |
70 | ||
71 | setup_net() { | |
72 | case $1 in | |
73 | start) | |
74 | $IP link add $HOST_IFC type veth peer name $NS_IFC || return $? | |
75 | $IP link set dev $HOST_IFC up || return $? | |
76 | sysctl -q net.ipv6.conf.$HOST_IFC.accept_dad=0 | |
77 | ||
78 | $IP netns add ns || return $? | |
79 | $IP link set dev $NS_IFC netns ns || return $? | |
80 | $IP -n $NS link set dev $NS_IFC up || return $? | |
81 | $IP netns exec $NS sysctl -q net.ipv6.conf.$NS_IFC.accept_dad=0 | |
82 | $TC qdisc add dev $HOST_IFC clsact || return $? | |
83 | $TC filter add dev $HOST_IFC egress bpf da obj $BPF_PROG sec $BPF_SECTION || return $? | |
84 | ;; | |
85 | *) | |
86 | $IP netns del $NS | |
87 | $IP link del $HOST_IFC | |
88 | ;; | |
89 | esac | |
90 | } | |
91 | ||
92 | run_in_cgrp() { | |
93 | # Fork another bash and move it under the specified cgroup. | |
94 | # It makes the cgroup cleanup easier at the end of the test. | |
95 | cmd='echo $$ > ' | |
96 | cmd="$cmd $1/cgroup.procs; exec $2" | |
97 | bash -c "$cmd" | |
98 | } | |
99 | ||
100 | do_test() { | |
101 | run_in_cgrp $CGRP2_TC_LEAF "ping -6 -c3 ff02::1%$HOST_IFC >& /dev/null" | |
102 | local dropped=$($TC -s qdisc show dev $HOST_IFC | tail -3 | \ | |
103 | awk '/drop/{print substr($7, 0, index($7, ",")-1)}') | |
104 | if [[ $dropped -eq 0 ]] | |
105 | then | |
106 | echo "FAIL" | |
107 | return 1 | |
108 | else | |
109 | echo "Successfully filtered $dropped packets" | |
110 | return 0 | |
111 | fi | |
112 | } | |
113 | ||
114 | do_exit() { | |
115 | if [ "$DEBUG" == "yes" ] && [ "$MODE" != 'cleanuponly' ] | |
116 | then | |
117 | echo "------ DEBUG ------" | |
118 | echo "mount: "; mount | egrep '(cgroup2|bpf)'; echo | |
119 | echo "$CGRP2_TC_LEAF: "; ls -l $CGRP2_TC_LEAF; echo | |
120 | if [ -d "$BPF_FS_TC_SHARE" ] | |
121 | then | |
122 | echo "$BPF_FS_TC_SHARE: "; ls -l $BPF_FS_TC_SHARE; echo | |
123 | fi | |
124 | echo "Host net:" | |
125 | $IP netns | |
126 | $IP link show dev $HOST_IFC | |
127 | $IP -6 a show dev $HOST_IFC | |
128 | $TC -s qdisc show dev $HOST_IFC | |
129 | echo | |
130 | echo "$NS net:" | |
131 | $IP -n $NS link show dev $NS_IFC | |
132 | $IP -n $NS -6 link show dev $NS_IFC | |
133 | echo "------ DEBUG ------" | |
134 | echo | |
135 | fi | |
136 | ||
137 | if [ "$MODE" != 'nocleanup' ] | |
138 | then | |
139 | setup_net stop | |
140 | setup_bpf_cgrp2_array stop | |
141 | setup_cgrp2 stop | |
142 | fi | |
143 | } | |
144 | ||
145 | init_cgrp2_vars | |
146 | init_bpf_fs_vars | |
147 | ||
148 | while [[ $# -ge 1 ]] | |
149 | do | |
150 | a="$1" | |
151 | case $a in | |
152 | debug) | |
153 | DEBUG='yes' | |
154 | shift 1 | |
155 | ;; | |
156 | cleanup-only) | |
157 | MODE='cleanuponly' | |
158 | shift 1 | |
159 | ;; | |
160 | no-cleanup) | |
161 | MODE='nocleanup' | |
162 | shift 1 | |
163 | ;; | |
164 | *) | |
165 | echo "test_cgrp2_tc [debug] [cleanup-only | no-cleanup]" | |
166 | echo " debug: Print cgrp and network setup details at the end of the test" | |
167 | echo " cleanup-only: Try to cleanup things from last test. No test will be run" | |
168 | echo " no-cleanup: Run the test but don't do cleanup at the end" | |
169 | echo "[Note: If no arg is given, it will run the test and do cleanup at the end]" | |
170 | echo | |
171 | exit -1 | |
172 | ;; | |
173 | esac | |
174 | done | |
175 | ||
176 | trap do_exit 0 | |
177 | ||
178 | [ "$MODE" == 'cleanuponly' ] && exit | |
179 | ||
180 | setup_cgrp2 start || exit $? | |
181 | setup_net start || exit $? | |
182 | init_bpf_fs_vars || exit $? | |
183 | setup_bpf_cgrp2_array start || exit $? | |
184 | do_test | |
185 | echo |