tools/testing/selftests/net/forwarding/mirror_gre_changes.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 # This test uses standard topology for testing gretap. See
   5 # mirror_gre_topo_lib.sh for more details.
   6 #
   7 # Test how mirrors to gretap and ip6gretap react to changes to relevant
   8 # configuration.
   9
  10 ALL_TESTS="
  11         test_ttl
  12         test_tun_up
  13         test_egress_up
  14         test_remote_ip
  15         test_tun_del
  16         test_route_del
  17 "
  18
  19 NUM_NETIFS=6
  20 source lib.sh
  21 source mirror_lib.sh
  22 source mirror_gre_lib.sh
  23 source mirror_gre_topo_lib.sh
  24
  25 setup_prepare()
  26 {
  27         h1=${NETIFS[p1]}
  28         swp1=${NETIFS[p2]}
  29
  30         swp2=${NETIFS[p3]}
  31         h2=${NETIFS[p4]}
  32
  33         swp3=${NETIFS[p5]}
  34         h3=${NETIFS[p6]}
  35
  36         vrf_prepare
  37         mirror_gre_topo_create
  38
  39         # This test downs $swp3, which deletes the configured IPv6 address
  40         # unless this sysctl is set.
  41         sysctl_set net.ipv6.conf.$swp3.keep_addr_on_down 1
  42
  43         ip address add dev $swp3 192.0.2.129/28
  44         ip address add dev $h3 192.0.2.130/28
  45
  46         ip address add dev $swp3 2001:db8:2::1/64
  47         ip address add dev $h3 2001:db8:2::2/64
  48 }
  49
  50 cleanup()
  51 {
  52         pre_cleanup
  53
  54         ip address del dev $h3 2001:db8:2::2/64
  55         ip address del dev $swp3 2001:db8:2::1/64
  56
  57         ip address del dev $h3 192.0.2.130/28
  58         ip address del dev $swp3 192.0.2.129/28
  59
  60         sysctl_restore net.ipv6.conf.$swp3.keep_addr_on_down
  61
  62         mirror_gre_topo_destroy
  63         vrf_cleanup
  64 }
  65
  66 test_span_gre_ttl()
  67 {
  68         local tundev=$1; shift
  69         local type=$1; shift
  70         local prot=$1; shift
  71         local what=$1; shift
  72
  73         RET=0
  74
  75         mirror_install $swp1 ingress $tundev "matchall $tcflags"
  76         tc filter add dev $h3 ingress pref 77 prot $prot \
  77                 flower ip_ttl 50 action pass
  78
  79         mirror_test v$h1 192.0.2.1 192.0.2.2 $h3 77 0
  80
  81         ip link set dev $tundev type $type ttl 50
  82         sleep 2
  83         mirror_test v$h1 192.0.2.1 192.0.2.2 $h3 77 10
  84
  85         ip link set dev $tundev type $type ttl 100
  86         tc filter del dev $h3 ingress pref 77
  87         mirror_uninstall $swp1 ingress
  88
  89         log_test "$what: TTL change ($tcflags)"
  90 }
  91
  92 test_span_gre_tun_up()
  93 {
  94         local tundev=$1; shift
  95         local what=$1; shift
  96
  97         RET=0
  98
  99         ip link set dev $tundev down
 100         mirror_install $swp1 ingress $tundev "matchall $tcflags"
 101         fail_test_span_gre_dir $tundev ingress
 102
 103         ip link set dev $tundev up
 104
 105         quick_test_span_gre_dir $tundev ingress
 106         mirror_uninstall $swp1 ingress
 107
 108         log_test "$what: tunnel down/up ($tcflags)"
 109 }
 110
 111 test_span_gre_egress_up()
 112 {
 113         local tundev=$1; shift
 114         local remote_ip=$1; shift
 115         local what=$1; shift
 116
 117         RET=0
 118
 119         ip link set dev $swp3 down
 120         mirror_install $swp1 ingress $tundev "matchall $tcflags"
 121         fail_test_span_gre_dir $tundev ingress
 122
 123         # After setting the device up, wait for neighbor to get resolved so that
 124         # we can expect mirroring to work.
 125         ip link set dev $swp3 up
 126         setup_wait_dev $swp3
 127         ping -c 1 -I $swp3 $remote_ip &>/dev/null
 128
 129         quick_test_span_gre_dir $tundev ingress
 130         mirror_uninstall $swp1 ingress
 131
 132         log_test "$what: egress down/up ($tcflags)"
 133 }
 134
 135 test_span_gre_remote_ip()
 136 {
 137         local tundev=$1; shift
 138         local type=$1; shift
 139         local correct_ip=$1; shift
 140         local wrong_ip=$1; shift
 141         local what=$1; shift
 142
 143         RET=0
 144
 145         ip link set dev $tundev type $type remote $wrong_ip
 146         mirror_install $swp1 ingress $tundev "matchall $tcflags"
 147         fail_test_span_gre_dir $tundev ingress
 148
 149         ip link set dev $tundev type $type remote $correct_ip
 150         quick_test_span_gre_dir $tundev ingress
 151         mirror_uninstall $swp1 ingress
 152
 153         log_test "$what: remote address change ($tcflags)"
 154 }
 155
 156 test_span_gre_tun_del()
 157 {
 158         local tundev=$1; shift
 159         local type=$1; shift
 160         local flags=$1; shift
 161         local local_ip=$1; shift
 162         local remote_ip=$1; shift
 163         local what=$1; shift
 164
 165         RET=0
 166
 167         mirror_install $swp1 ingress $tundev "matchall $tcflags"
 168         quick_test_span_gre_dir $tundev ingress
 169         ip link del dev $tundev
 170         fail_test_span_gre_dir $tundev ingress
 171
 172         tunnel_create $tundev $type $local_ip $remote_ip \
 173                       ttl 100 tos inherit $flags
 174
 175         # Recreating the tunnel doesn't reestablish mirroring, so reinstall it
 176         # and verify it works for the follow-up tests.
 177         mirror_uninstall $swp1 ingress
 178         mirror_install $swp1 ingress $tundev "matchall $tcflags"
 179         quick_test_span_gre_dir $tundev ingress
 180         mirror_uninstall $swp1 ingress
 181
 182         log_test "$what: tunnel deleted ($tcflags)"
 183 }
 184
 185 test_span_gre_route_del()
 186 {
 187         local tundev=$1; shift
 188         local edev=$1; shift
 189         local route=$1; shift
 190         local what=$1; shift
 191
 192         RET=0
 193
 194         mirror_install $swp1 ingress $tundev "matchall $tcflags"
 195         quick_test_span_gre_dir $tundev ingress
 196
 197         ip route del $route dev $edev
 198         fail_test_span_gre_dir $tundev ingress
 199
 200         ip route add $route dev $edev
 201         quick_test_span_gre_dir $tundev ingress
 202
 203         mirror_uninstall $swp1 ingress
 204
 205         log_test "$what: underlay route removal ($tcflags)"
 206 }
 207
 208 test_ttl()
 209 {
 210         test_span_gre_ttl gt4 gretap ip "mirror to gretap"
 211         test_span_gre_ttl gt6 ip6gretap ipv6 "mirror to ip6gretap"
 212 }
 213
 214 test_tun_up()
 215 {
 216         test_span_gre_tun_up gt4 "mirror to gretap"
 217         test_span_gre_tun_up gt6 "mirror to ip6gretap"
 218 }
 219
 220 test_egress_up()
 221 {
 222         test_span_gre_egress_up gt4 192.0.2.130 "mirror to gretap"
 223         test_span_gre_egress_up gt6 2001:db8:2::2 "mirror to ip6gretap"
 224 }
 225
 226 test_remote_ip()
 227 {
 228         test_span_gre_remote_ip gt4 gretap 192.0.2.130 192.0.2.132 "mirror to gretap"
 229         test_span_gre_remote_ip gt6 ip6gretap 2001:db8:2::2 2001:db8:2::4 "mirror to ip6gretap"
 230 }
 231
 232 test_tun_del()
 233 {
 234         test_span_gre_tun_del gt4 gretap "" \
 235                               192.0.2.129 192.0.2.130 "mirror to gretap"
 236         test_span_gre_tun_del gt6 ip6gretap allow-localremote \
 237                               2001:db8:2::1 2001:db8:2::2 "mirror to ip6gretap"
 238 }
 239
 240 test_route_del()
 241 {
 242         test_span_gre_route_del gt4 $swp3 192.0.2.128/28 "mirror to gretap"
 243         test_span_gre_route_del gt6 $swp3 2001:db8:2::/64 "mirror to ip6gretap"
 244 }
 245
 246 test_all()
 247 {
 248         slow_path_trap_install $swp1 ingress
 249         slow_path_trap_install $swp1 egress
 250
 251         tests_run
 252
 253         slow_path_trap_uninstall $swp1 egress
 254         slow_path_trap_uninstall $swp1 ingress
 255 }
 256
 257 trap cleanup EXIT
 258
 259 setup_prepare
 260 setup_wait
 261
 262 tcflags="skip_hw"
 263 test_all
 264
 265 if ! tc_offload_check; then
 266         echo "WARN: Could not test offloaded functionality"
 267 else
 268         tcflags="skip_sw"
 269         test_all
 270 fi
 271
 272 exit $EXIT_STATUS