380 lines · bash
1#!/bin/bash2# SPDX-License-Identifier: GPL-2.03 4ALL_TESTS="5 test_defaults6 test_dcb_ets7 test_mtu8 test_pfc9 test_int_buf10 test_tc_priomap11 test_tc_mtu12 test_tc_sizes13 test_tc_int_buf14"15 16lib_dir=$(dirname $0)/../../../net/forwarding17 18NUM_NETIFS=019source $lib_dir/lib.sh20source $lib_dir/devlink_lib.sh21 22swp=$NETIF_NO_CABLE23 24cleanup()25{26 pre_cleanup27}28 29get_prio_pg()30{31 # Produces a string of numbers "<B0> <B1> ... <B7> ", where BX is number32 # of buffer that priority X is mapped to.33 dcb -j buffer show dev $swp |34 jq -r '[.prio_buffer | .[] | tostring + " "] | add'35}36 37get_prio_pfc()38{39 # Produces a string of numbers "<P0> <P1> ... <P7> ", where PX denotes40 # whether priority X has PFC enabled (the value is 1) or disabled (0).41 dcb -j pfc show dev $swp |42 jq -r '[.prio_pfc | .[] | if . then "1 " else "0 " end] | add'43}44 45get_prio_tc()46{47 # Produces a string of numbers "<T0> <T1> ... <T7> ", where TC is number48 # of TC that priority X is mapped to.49 dcb -j ets show dev $swp |50 jq -r '[.prio_tc | .[] | tostring + " "] | add'51}52 53get_buf_size()54{55 local idx=$1; shift56 57 dcb -j buffer show dev $swp | jq ".buffer_size[$idx]"58}59 60get_tot_size()61{62 dcb -j buffer show dev $swp | jq '.total_size'63}64 65check_prio_pg()66{67 local expect=$1; shift68 69 local current=$(get_prio_pg)70 test "$current" = "$expect"71 check_err $? "prio2buffer is '$current', expected '$expect'"72}73 74check_prio_pfc()75{76 local expect=$1; shift77 78 local current=$(get_prio_pfc)79 test "$current" = "$expect"80 check_err $? "prio PFC is '$current', expected '$expect'"81}82 83check_prio_tc()84{85 local expect=$1; shift86 87 local current=$(get_prio_tc)88 test "$current" = "$expect"89 check_err $? "prio_tc is '$current', expected '$expect'"90}91 92__check_buf_size()93{94 local idx=$1; shift95 local expr=$1; shift96 local what=$1; shift97 98 local current=$(get_buf_size $idx)99 ((current $expr))100 check_err $? "${what}buffer $idx size is '$current', expected '$expr'"101 echo $current102}103 104check_buf_size()105{106 __check_buf_size "$@" > /dev/null107}108 109test_defaults()110{111 RET=0112 113 check_prio_pg "0 0 0 0 0 0 0 0 "114 check_prio_tc "0 0 0 0 0 0 0 0 "115 check_prio_pfc "0 0 0 0 0 0 0 0 "116 117 log_test "Default headroom configuration"118}119 120test_dcb_ets()121{122 RET=0123 124 dcb ets set dev $swp prio-tc 0:0 1:2 2:4 3:6 4:1 5:3 6:5 7:7125 126 check_prio_pg "0 2 4 6 1 3 5 7 "127 check_prio_tc "0 2 4 6 1 3 5 7 "128 check_prio_pfc "0 0 0 0 0 0 0 0 "129 130 dcb ets set dev $swp prio-tc all:0131 132 check_prio_pg "0 0 0 0 0 0 0 0 "133 check_prio_tc "0 0 0 0 0 0 0 0 "134 135 dcb buffer set dev $swp prio-buffer 0:1 1:3 2:5 3:7 4:0 5:2 6:4 7:6 2>/dev/null136 check_fail $? "prio2buffer accepted in DCB mode"137 138 log_test "Configuring headroom through ETS"139}140 141test_mtu()142{143 local what=$1; shift144 local buf0size_2145 local buf0size146 147 RET=0148 buf0size=$(__check_buf_size 0 "> 0")149 150 mtu_set $swp 3000151 buf0size_2=$(__check_buf_size 0 "> $buf0size" "MTU 3000: ")152 mtu_restore $swp153 154 mtu_set $swp 6000155 check_buf_size 0 "> $buf0size_2" "MTU 6000: "156 mtu_restore $swp157 158 check_buf_size 0 "== $buf0size"159 160 log_test "${what}MTU impacts buffer size"161}162 163test_tc_mtu()164{165 # In TC mode, MTU still impacts the threshold below which a buffer is166 # not permitted to go.167 168 tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M169 test_mtu "TC: "170 tc qdisc delete dev $swp root171}172 173test_pfc()174{175 RET=0176 177 dcb ets set dev $swp prio-tc all:0 5:1 6:2 7:3178 179 local buf0size=$(get_buf_size 0)180 local buf1size=$(get_buf_size 1)181 local buf2size=$(get_buf_size 2)182 local buf3size=$(get_buf_size 3)183 check_buf_size 0 "> 0"184 check_buf_size 1 "> 0"185 check_buf_size 2 "> 0"186 check_buf_size 3 "> 0"187 check_buf_size 4 "== 0"188 check_buf_size 5 "== 0"189 check_buf_size 6 "== 0"190 check_buf_size 7 "== 0"191 192 log_test "Buffer size sans PFC"193 194 RET=0195 196 dcb pfc set dev $swp prio-pfc all:off 5:on 6:on 7:on delay 0197 198 check_prio_pg "0 0 0 0 0 1 2 3 "199 check_prio_pfc "0 0 0 0 0 1 1 1 "200 check_buf_size 0 "== $buf0size"201 check_buf_size 1 "> $buf1size"202 check_buf_size 2 "> $buf2size"203 check_buf_size 3 "> $buf3size"204 205 local buf1size=$(get_buf_size 1)206 check_buf_size 2 "== $buf1size"207 check_buf_size 3 "== $buf1size"208 209 log_test "PFC: Cable length 0"210 211 RET=0212 213 dcb pfc set dev $swp delay 1000214 215 check_buf_size 0 "== $buf0size"216 check_buf_size 1 "> $buf1size"217 check_buf_size 2 "> $buf1size"218 check_buf_size 3 "> $buf1size"219 220 log_test "PFC: Cable length 1000"221 222 RET=0223 224 dcb pfc set dev $swp prio-pfc all:off delay 0225 dcb ets set dev $swp prio-tc all:0226 227 check_prio_pg "0 0 0 0 0 0 0 0 "228 check_prio_tc "0 0 0 0 0 0 0 0 "229 check_buf_size 0 "> 0"230 check_buf_size 1 "== 0"231 check_buf_size 2 "== 0"232 check_buf_size 3 "== 0"233 check_buf_size 4 "== 0"234 check_buf_size 5 "== 0"235 check_buf_size 6 "== 0"236 check_buf_size 7 "== 0"237 238 log_test "PFC: Restore defaults"239}240 241test_tc_priomap()242{243 RET=0244 245 dcb ets set dev $swp prio-tc 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7246 check_prio_pg "0 1 2 3 4 5 6 7 "247 248 tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M249 check_prio_pg "0 0 0 0 0 0 0 0 "250 251 dcb buffer set dev $swp prio-buffer 0:1 1:3 2:5 3:7 4:0 5:2 6:4 7:6252 check_prio_pg "1 3 5 7 0 2 4 6 "253 254 tc qdisc delete dev $swp root255 check_prio_pg "0 1 2 3 4 5 6 7 "256 257 # Clean up.258 tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M259 dcb buffer set dev $swp prio-buffer all:0260 tc qdisc delete dev $swp root261 dcb ets set dev $swp prio-tc all:0262 263 log_test "TC: priomap"264}265 266test_tc_sizes()267{268 local cell_size=$(devlink_cell_size_get)269 local size=$((cell_size * 1000))270 271 RET=0272 273 dcb buffer set dev $swp buffer-size all:0 0:$size 2>/dev/null274 check_fail $? "buffer_size should fail before qdisc is added"275 276 tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M277 278 dcb buffer set dev $swp buffer-size all:0 0:$size279 check_err $? "buffer_size should pass after qdisc is added"280 check_buf_size 0 "== $size" "set size: "281 282 mtu_set $swp 6000283 check_buf_size 0 "== $size" "set MTU: "284 mtu_restore $swp285 286 dcb buffer set dev $swp buffer-size all:0287 288 # After replacing the qdisc for the same kind, buffer_size still has to289 # work.290 tc qdisc replace dev $swp root handle 1: bfifo limit 1M291 292 dcb buffer set dev $swp buffer-size all:0 0:$size293 check_buf_size 0 "== $size" "post replace, set size: "294 295 dcb buffer set dev $swp buffer-size all:0296 297 # Likewise after replacing for a different kind.298 tc qdisc replace dev $swp root handle 2: prio bands 8299 300 dcb buffer set dev $swp buffer-size all:0 0:$size301 check_buf_size 0 "== $size" "post replace different kind, set size: "302 303 tc qdisc delete dev $swp root304 305 dcb buffer set dev $swp buffer-size all:0 0:$size 2>/dev/null306 check_fail $? "buffer_size should fail after qdisc is deleted"307 308 log_test "TC: buffer size"309}310 311test_int_buf()312{313 local what=$1; shift314 315 RET=0316 317 local buf0size=$(get_buf_size 0)318 local tot_size=$(get_tot_size)319 320 # Size of internal buffer and buffer 9.321 local dsize=$((tot_size - buf0size))322 323 tc qdisc add dev $swp clsact324 tc filter add dev $swp egress matchall skip_sw action mirred egress mirror dev $swp325 326 local buf0size_2=$(get_buf_size 0)327 local tot_size_2=$(get_tot_size)328 local dsize_2=$((tot_size_2 - buf0size_2))329 330 # Egress SPAN should have added to the "invisible" buffer configuration.331 ((dsize_2 > dsize))332 check_err $? "Invisible buffers account for '$dsize_2', expected '> $dsize'"333 334 mtu_set $swp 3000335 336 local buf0size_3=$(get_buf_size 0)337 local tot_size_3=$(get_tot_size)338 local dsize_3=$((tot_size_3 - buf0size_3))339 340 # MTU change might change buffer 0, which will show at total, but the341 # hidden buffers should stay the same size.342 ((dsize_3 == dsize_2))343 check_err $? "MTU change: Invisible buffers account for '$dsize_3', expected '== $dsize_2'"344 345 mtu_restore $swp346 tc qdisc del dev $swp clsact347 348 # After SPAN removal, hidden buffers should be back to the original sizes.349 local buf0size_4=$(get_buf_size 0)350 local tot_size_4=$(get_tot_size)351 local dsize_4=$((tot_size_4 - buf0size_4))352 ((dsize_4 == dsize))353 check_err $? "SPAN removed: Invisible buffers account for '$dsize_4', expected '== $dsize'"354 355 log_test "${what}internal buffer size"356}357 358test_tc_int_buf()359{360 local cell_size=$(devlink_cell_size_get)361 local size=$((cell_size * 1000))362 363 tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M364 test_int_buf "TC: "365 366 dcb buffer set dev $swp buffer-size all:0 0:$size367 test_int_buf "TC+buffsize: "368 369 dcb buffer set dev $swp buffer-size all:0370 tc qdisc delete dev $swp root371}372 373bail_on_lldpad "configure DCB" "configure Qdiscs"374 375trap cleanup EXIT376setup_wait377tests_run378 379exit $EXIT_STATUS380