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