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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 | #!/bin/bash # SPDX-License-Identifier: GPL-2.0 # # Test traffic distribution between two paths when using custom hash policy. # # +--------------------------------+ # | H1 | # | $h1 + | # | 198.51.100.{2-253}/24 | | # | 2001:db8:1::{2-fd}/64 | | # +-------------------------|------+ # | # +-------------------------|-------------------------+ # | SW1 | | # | $rp1 + | # | 198.51.100.1/24 | # | 2001:db8:1::1/64 | # | | # | | # | $rp11 + + $rp12 | # | 192.0.2.1/28 | | 192.0.2.17/28 | # | 2001:db8:2::1/64 | | 2001:db8:3::1/64 | # +------------------|-------------|------------------+ # | | # +------------------|-------------|------------------+ # | SW2 | | | # | | | | # | $rp21 + + $rp22 | # | 192.0.2.2/28 192.0.2.18/28 | # | 2001:db8:2::2/64 2001:db8:3::2/64 | # | | # | | # | $rp2 + | # | 203.0.113.1/24 | | # | 2001:db8:4::1/64 | | # +-------------------------|-------------------------+ # | # +-------------------------|------+ # | H2 | | # | $h2 + | # | 203.0.113.{2-253}/24 | # | 2001:db8:4::{2-fd}/64 | # +--------------------------------+ ALL_TESTS=" ping_ipv4 ping_ipv6 custom_hash " NUM_NETIFS=8 source lib.sh h1_create() { simple_if_init $h1 198.51.100.2/24 2001:db8:1::2/64 ip route add vrf v$h1 default via 198.51.100.1 dev $h1 ip -6 route add vrf v$h1 default via 2001:db8:1::1 dev $h1 } h1_destroy() { ip -6 route del vrf v$h1 default ip route del vrf v$h1 default simple_if_fini $h1 198.51.100.2/24 2001:db8:1::2/64 } sw1_create() { simple_if_init $rp1 198.51.100.1/24 2001:db8:1::1/64 __simple_if_init $rp11 v$rp1 192.0.2.1/28 2001:db8:2::1/64 __simple_if_init $rp12 v$rp1 192.0.2.17/28 2001:db8:3::1/64 ip route add vrf v$rp1 203.0.113.0/24 \ nexthop via 192.0.2.2 dev $rp11 \ nexthop via 192.0.2.18 dev $rp12 ip -6 route add vrf v$rp1 2001:db8:4::/64 \ nexthop via 2001:db8:2::2 dev $rp11 \ nexthop via 2001:db8:3::2 dev $rp12 } sw1_destroy() { ip -6 route del vrf v$rp1 2001:db8:4::/64 ip route del vrf v$rp1 203.0.113.0/24 __simple_if_fini $rp12 192.0.2.17/28 2001:db8:3::1/64 __simple_if_fini $rp11 192.0.2.1/28 2001:db8:2::1/64 simple_if_fini $rp1 198.51.100.1/24 2001:db8:1::1/64 } sw2_create() { simple_if_init $rp2 203.0.113.1/24 2001:db8:4::1/64 __simple_if_init $rp21 v$rp2 192.0.2.2/28 2001:db8:2::2/64 __simple_if_init $rp22 v$rp2 192.0.2.18/28 2001:db8:3::2/64 ip route add vrf v$rp2 198.51.100.0/24 \ nexthop via 192.0.2.1 dev $rp21 \ nexthop via 192.0.2.17 dev $rp22 ip -6 route add vrf v$rp2 2001:db8:1::/64 \ nexthop via 2001:db8:2::1 dev $rp21 \ nexthop via 2001:db8:3::1 dev $rp22 } sw2_destroy() { ip -6 route del vrf v$rp2 2001:db8:1::/64 ip route del vrf v$rp2 198.51.100.0/24 __simple_if_fini $rp22 192.0.2.18/28 2001:db8:3::2/64 __simple_if_fini $rp21 192.0.2.2/28 2001:db8:2::2/64 simple_if_fini $rp2 203.0.113.1/24 2001:db8:4::1/64 } h2_create() { simple_if_init $h2 203.0.113.2/24 2001:db8:4::2/64 ip route add vrf v$h2 default via 203.0.113.1 dev $h2 ip -6 route add vrf v$h2 default via 2001:db8:4::1 dev $h2 } h2_destroy() { ip -6 route del vrf v$h2 default ip route del vrf v$h2 default simple_if_fini $h2 203.0.113.2/24 2001:db8:4::2/64 } setup_prepare() { h1=${NETIFS[p1]} rp1=${NETIFS[p2]} rp11=${NETIFS[p3]} rp21=${NETIFS[p4]} rp12=${NETIFS[p5]} rp22=${NETIFS[p6]} rp2=${NETIFS[p7]} h2=${NETIFS[p8]} vrf_prepare h1_create sw1_create sw2_create h2_create forwarding_enable } cleanup() { pre_cleanup forwarding_restore h2_destroy sw2_destroy sw1_destroy h1_destroy vrf_cleanup } ping_ipv4() { ping_test $h1 203.0.113.2 } ping_ipv6() { ping6_test $h1 2001:db8:4::2 } send_src_ipv4() { ip vrf exec v$h1 $MZ $h1 -q -p 64 \ -A "198.51.100.2-198.51.100.253" -B 203.0.113.2 \ -d 1msec -c 50 -t udp "sp=20000,dp=30000" } send_dst_ipv4() { ip vrf exec v$h1 $MZ $h1 -q -p 64 \ -A 198.51.100.2 -B "203.0.113.2-203.0.113.253" \ -d 1msec -c 50 -t udp "sp=20000,dp=30000" } send_src_udp4() { ip vrf exec v$h1 $MZ $h1 -q -p 64 \ -A 198.51.100.2 -B 203.0.113.2 \ -d 1msec -t udp "sp=0-32768,dp=30000" } send_dst_udp4() { ip vrf exec v$h1 $MZ $h1 -q -p 64 \ -A 198.51.100.2 -B 203.0.113.2 \ -d 1msec -t udp "sp=20000,dp=0-32768" } send_src_ipv6() { ip vrf exec v$h1 $MZ -6 $h1 -q -p 64 \ -A "2001:db8:1::2-2001:db8:1::fd" -B 2001:db8:4::2 \ -d 1msec -c 50 -t udp "sp=20000,dp=30000" } send_dst_ipv6() { ip vrf exec v$h1 $MZ -6 $h1 -q -p 64 \ -A 2001:db8:1::2 -B "2001:db8:4::2-2001:db8:4::fd" \ -d 1msec -c 50 -t udp "sp=20000,dp=30000" } send_flowlabel() { # Generate 16384 echo requests, each with a random flow label. for _ in $(seq 1 16384); do ip vrf exec v$h1 \ $PING6 2001:db8:4::2 -F 0 -c 1 -q >/dev/null 2>&1 done } send_src_udp6() { ip vrf exec v$h1 $MZ -6 $h1 -q -p 64 \ -A 2001:db8:1::2 -B 2001:db8:4::2 \ -d 1msec -t udp "sp=0-32768,dp=30000" } send_dst_udp6() { ip vrf exec v$h1 $MZ -6 $h1 -q -p 64 \ -A 2001:db8:1::2 -B 2001:db8:4::2 \ -d 1msec -t udp "sp=20000,dp=0-32768" } custom_hash_test() { local field="$1"; shift local balanced="$1"; shift local send_flows="$@" RET=0 local t0_rp11=$(link_stats_tx_packets_get $rp11) local t0_rp12=$(link_stats_tx_packets_get $rp12) $send_flows local t1_rp11=$(link_stats_tx_packets_get $rp11) local t1_rp12=$(link_stats_tx_packets_get $rp12) local d_rp11=$((t1_rp11 - t0_rp11)) local d_rp12=$((t1_rp12 - t0_rp12)) local diff=$((d_rp12 - d_rp11)) local sum=$((d_rp11 + d_rp12)) local pct=$(echo "$diff / $sum * 100" | bc -l) local is_balanced=$(echo "-20 <= $pct && $pct <= 20" | bc) [[ ( $is_balanced -eq 1 && $balanced == "balanced" ) || ( $is_balanced -eq 0 && $balanced == "unbalanced" ) ]] check_err $? "Expected traffic to be $balanced, but it is not" log_test "Multipath hash field: $field ($balanced)" log_info "Packets sent on path1 / path2: $d_rp11 / $d_rp12" } custom_hash_v4() { log_info "Running IPv4 custom multipath hash tests" sysctl_set net.ipv4.fib_multipath_hash_policy 3 # Prevent the neighbour table from overflowing, as different neighbour # entries will be created on $ol4 when using different destination IPs. sysctl_set net.ipv4.neigh.default.gc_thresh1 1024 sysctl_set net.ipv4.neigh.default.gc_thresh2 1024 sysctl_set net.ipv4.neigh.default.gc_thresh3 1024 sysctl_set net.ipv4.fib_multipath_hash_fields 0x0001 custom_hash_test "Source IP" "balanced" send_src_ipv4 custom_hash_test "Source IP" "unbalanced" send_dst_ipv4 sysctl_set net.ipv4.fib_multipath_hash_fields 0x0002 custom_hash_test "Destination IP" "balanced" send_dst_ipv4 custom_hash_test "Destination IP" "unbalanced" send_src_ipv4 sysctl_set net.ipv4.fib_multipath_hash_fields 0x0010 custom_hash_test "Source port" "balanced" send_src_udp4 custom_hash_test "Source port" "unbalanced" send_dst_udp4 sysctl_set net.ipv4.fib_multipath_hash_fields 0x0020 custom_hash_test "Destination port" "balanced" send_dst_udp4 custom_hash_test "Destination port" "unbalanced" send_src_udp4 sysctl_restore net.ipv4.neigh.default.gc_thresh3 sysctl_restore net.ipv4.neigh.default.gc_thresh2 sysctl_restore net.ipv4.neigh.default.gc_thresh1 sysctl_restore net.ipv4.fib_multipath_hash_policy } custom_hash_v6() { log_info "Running IPv6 custom multipath hash tests" sysctl_set net.ipv6.fib_multipath_hash_policy 3 # Prevent the neighbour table from overflowing, as different neighbour # entries will be created on $ol4 when using different destination IPs. sysctl_set net.ipv6.neigh.default.gc_thresh1 1024 sysctl_set net.ipv6.neigh.default.gc_thresh2 1024 sysctl_set net.ipv6.neigh.default.gc_thresh3 1024 sysctl_set net.ipv6.fib_multipath_hash_fields 0x0001 custom_hash_test "Source IP" "balanced" send_src_ipv6 custom_hash_test "Source IP" "unbalanced" send_dst_ipv6 sysctl_set net.ipv6.fib_multipath_hash_fields 0x0002 custom_hash_test "Destination IP" "balanced" send_dst_ipv6 custom_hash_test "Destination IP" "unbalanced" send_src_ipv6 sysctl_set net.ipv6.fib_multipath_hash_fields 0x0008 custom_hash_test "Flowlabel" "balanced" send_flowlabel custom_hash_test "Flowlabel" "unbalanced" send_src_ipv6 sysctl_set net.ipv6.fib_multipath_hash_fields 0x0010 custom_hash_test "Source port" "balanced" send_src_udp6 custom_hash_test "Source port" "unbalanced" send_dst_udp6 sysctl_set net.ipv6.fib_multipath_hash_fields 0x0020 custom_hash_test "Destination port" "balanced" send_dst_udp6 custom_hash_test "Destination port" "unbalanced" send_src_udp6 sysctl_restore net.ipv6.neigh.default.gc_thresh3 sysctl_restore net.ipv6.neigh.default.gc_thresh2 sysctl_restore net.ipv6.neigh.default.gc_thresh1 sysctl_restore net.ipv6.fib_multipath_hash_policy } custom_hash() { # Test that when the hash policy is set to custom, traffic is # distributed only according to the fields set in the # fib_multipath_hash_fields sysctl. # # Each time set a different field and make sure traffic is only # distributed when the field is changed in the packet stream. custom_hash_v4 custom_hash_v6 } trap cleanup EXIT setup_prepare setup_wait tests_run exit $EXIT_STATUS |