381 lines
8.2 KiB
Bash
381 lines
8.2 KiB
Bash
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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ALL_TESTS="
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test_defaults
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test_dcb_ets
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test_mtu
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test_pfc
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test_int_buf
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test_tc_priomap
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test_tc_mtu
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test_tc_sizes
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test_tc_int_buf
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"
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lib_dir=$(dirname $0)/../../../net/forwarding
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NUM_NETIFS=0
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source $lib_dir/lib.sh
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source $lib_dir/devlink_lib.sh
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source qos_lib.sh
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swp=$NETIF_NO_CABLE
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cleanup()
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{
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pre_cleanup
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}
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get_prio_pg()
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{
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# Produces a string of numbers "<B0> <B1> ... <B7> ", where BX is number
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# of buffer that priority X is mapped to.
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dcb -j buffer show dev $swp |
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jq -r '[.prio_buffer | .[] | tostring + " "] | add'
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}
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get_prio_pfc()
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{
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# Produces a string of numbers "<P0> <P1> ... <P7> ", where PX denotes
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# whether priority X has PFC enabled (the value is 1) or disabled (0).
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dcb -j pfc show dev $swp |
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jq -r '[.prio_pfc | .[] | if . then "1 " else "0 " end] | add'
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}
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get_prio_tc()
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{
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# Produces a string of numbers "<T0> <T1> ... <T7> ", where TC is number
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# of TC that priority X is mapped to.
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dcb -j ets show dev $swp |
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jq -r '[.prio_tc | .[] | tostring + " "] | add'
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}
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get_buf_size()
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{
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local idx=$1; shift
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dcb -j buffer show dev $swp | jq ".buffer_size[$idx]"
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}
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get_tot_size()
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{
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dcb -j buffer show dev $swp | jq '.total_size'
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}
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check_prio_pg()
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{
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local expect=$1; shift
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local current=$(get_prio_pg)
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test "$current" = "$expect"
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check_err $? "prio2buffer is '$current', expected '$expect'"
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}
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check_prio_pfc()
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{
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local expect=$1; shift
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local current=$(get_prio_pfc)
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test "$current" = "$expect"
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check_err $? "prio PFC is '$current', expected '$expect'"
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}
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check_prio_tc()
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{
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local expect=$1; shift
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local current=$(get_prio_tc)
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test "$current" = "$expect"
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check_err $? "prio_tc is '$current', expected '$expect'"
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}
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__check_buf_size()
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{
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local idx=$1; shift
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local expr=$1; shift
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local what=$1; shift
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local current=$(get_buf_size $idx)
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((current $expr))
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check_err $? "${what}buffer $idx size is '$current', expected '$expr'"
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echo $current
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}
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check_buf_size()
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{
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__check_buf_size "$@" > /dev/null
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}
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test_defaults()
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{
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RET=0
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check_prio_pg "0 0 0 0 0 0 0 0 "
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check_prio_tc "0 0 0 0 0 0 0 0 "
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check_prio_pfc "0 0 0 0 0 0 0 0 "
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log_test "Default headroom configuration"
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}
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test_dcb_ets()
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{
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RET=0
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dcb ets set dev $swp prio-tc 0:0 1:2 2:4 3:6 4:1 5:3 6:5 7:7
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check_prio_pg "0 2 4 6 1 3 5 7 "
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check_prio_tc "0 2 4 6 1 3 5 7 "
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check_prio_pfc "0 0 0 0 0 0 0 0 "
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dcb ets set dev $swp prio-tc all:0
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check_prio_pg "0 0 0 0 0 0 0 0 "
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check_prio_tc "0 0 0 0 0 0 0 0 "
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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/null
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check_fail $? "prio2buffer accepted in DCB mode"
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log_test "Configuring headroom through ETS"
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}
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test_mtu()
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{
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local what=$1; shift
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local buf0size_2
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local buf0size
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RET=0
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buf0size=$(__check_buf_size 0 "> 0")
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mtu_set $swp 3000
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buf0size_2=$(__check_buf_size 0 "> $buf0size" "MTU 3000: ")
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mtu_restore $swp
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mtu_set $swp 6000
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check_buf_size 0 "> $buf0size_2" "MTU 6000: "
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mtu_restore $swp
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check_buf_size 0 "== $buf0size"
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log_test "${what}MTU impacts buffer size"
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}
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test_tc_mtu()
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{
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# In TC mode, MTU still impacts the threshold below which a buffer is
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# not permitted to go.
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tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M
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test_mtu "TC: "
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tc qdisc delete dev $swp root
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}
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test_pfc()
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{
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RET=0
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dcb ets set dev $swp prio-tc all:0 5:1 6:2 7:3
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local buf0size=$(get_buf_size 0)
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local buf1size=$(get_buf_size 1)
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local buf2size=$(get_buf_size 2)
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local buf3size=$(get_buf_size 3)
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check_buf_size 0 "> 0"
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check_buf_size 1 "> 0"
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check_buf_size 2 "> 0"
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check_buf_size 3 "> 0"
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check_buf_size 4 "== 0"
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check_buf_size 5 "== 0"
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check_buf_size 6 "== 0"
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check_buf_size 7 "== 0"
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log_test "Buffer size sans PFC"
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RET=0
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dcb pfc set dev $swp prio-pfc all:off 5:on 6:on 7:on delay 0
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check_prio_pg "0 0 0 0 0 1 2 3 "
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check_prio_pfc "0 0 0 0 0 1 1 1 "
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check_buf_size 0 "== $buf0size"
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check_buf_size 1 "> $buf1size"
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check_buf_size 2 "> $buf2size"
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check_buf_size 3 "> $buf3size"
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local buf1size=$(get_buf_size 1)
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check_buf_size 2 "== $buf1size"
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check_buf_size 3 "== $buf1size"
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log_test "PFC: Cable length 0"
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RET=0
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dcb pfc set dev $swp delay 1000
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check_buf_size 0 "== $buf0size"
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check_buf_size 1 "> $buf1size"
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check_buf_size 2 "> $buf1size"
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check_buf_size 3 "> $buf1size"
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log_test "PFC: Cable length 1000"
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RET=0
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dcb pfc set dev $swp prio-pfc all:off delay 0
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dcb ets set dev $swp prio-tc all:0
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check_prio_pg "0 0 0 0 0 0 0 0 "
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check_prio_tc "0 0 0 0 0 0 0 0 "
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check_buf_size 0 "> 0"
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check_buf_size 1 "== 0"
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check_buf_size 2 "== 0"
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check_buf_size 3 "== 0"
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check_buf_size 4 "== 0"
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check_buf_size 5 "== 0"
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check_buf_size 6 "== 0"
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check_buf_size 7 "== 0"
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log_test "PFC: Restore defaults"
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}
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test_tc_priomap()
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{
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RET=0
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dcb ets set dev $swp prio-tc 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7
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check_prio_pg "0 1 2 3 4 5 6 7 "
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tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M
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check_prio_pg "0 0 0 0 0 0 0 0 "
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dcb buffer set dev $swp prio-buffer 0:1 1:3 2:5 3:7 4:0 5:2 6:4 7:6
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check_prio_pg "1 3 5 7 0 2 4 6 "
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tc qdisc delete dev $swp root
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check_prio_pg "0 1 2 3 4 5 6 7 "
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# Clean up.
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tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M
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dcb buffer set dev $swp prio-buffer all:0
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tc qdisc delete dev $swp root
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dcb ets set dev $swp prio-tc all:0
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log_test "TC: priomap"
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}
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test_tc_sizes()
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{
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local cell_size=$(devlink_cell_size_get)
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local size=$((cell_size * 1000))
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RET=0
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dcb buffer set dev $swp buffer-size all:0 0:$size 2>/dev/null
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check_fail $? "buffer_size should fail before qdisc is added"
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tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M
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dcb buffer set dev $swp buffer-size all:0 0:$size
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check_err $? "buffer_size should pass after qdisc is added"
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check_buf_size 0 "== $size" "set size: "
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mtu_set $swp 6000
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check_buf_size 0 "== $size" "set MTU: "
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mtu_restore $swp
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dcb buffer set dev $swp buffer-size all:0
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# After replacing the qdisc for the same kind, buffer_size still has to
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# work.
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tc qdisc replace dev $swp root handle 1: bfifo limit 1M
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dcb buffer set dev $swp buffer-size all:0 0:$size
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check_buf_size 0 "== $size" "post replace, set size: "
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dcb buffer set dev $swp buffer-size all:0
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# Likewise after replacing for a different kind.
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tc qdisc replace dev $swp root handle 2: prio bands 8
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dcb buffer set dev $swp buffer-size all:0 0:$size
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check_buf_size 0 "== $size" "post replace different kind, set size: "
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tc qdisc delete dev $swp root
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dcb buffer set dev $swp buffer-size all:0 0:$size 2>/dev/null
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check_fail $? "buffer_size should fail after qdisc is deleted"
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log_test "TC: buffer size"
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}
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test_int_buf()
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{
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local what=$1; shift
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RET=0
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local buf0size=$(get_buf_size 0)
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local tot_size=$(get_tot_size)
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# Size of internal buffer and buffer 9.
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local dsize=$((tot_size - buf0size))
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tc qdisc add dev $swp clsact
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tc filter add dev $swp egress matchall skip_sw action mirred egress mirror dev $swp
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local buf0size_2=$(get_buf_size 0)
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local tot_size_2=$(get_tot_size)
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local dsize_2=$((tot_size_2 - buf0size_2))
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# Egress SPAN should have added to the "invisible" buffer configuration.
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((dsize_2 > dsize))
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check_err $? "Invisible buffers account for '$dsize_2', expected '> $dsize'"
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mtu_set $swp 3000
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local buf0size_3=$(get_buf_size 0)
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local tot_size_3=$(get_tot_size)
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local dsize_3=$((tot_size_3 - buf0size_3))
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# MTU change might change buffer 0, which will show at total, but the
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# hidden buffers should stay the same size.
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((dsize_3 == dsize_2))
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check_err $? "MTU change: Invisible buffers account for '$dsize_3', expected '== $dsize_2'"
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mtu_restore $swp
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tc qdisc del dev $swp clsact
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# After SPAN removal, hidden buffers should be back to the original sizes.
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local buf0size_4=$(get_buf_size 0)
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local tot_size_4=$(get_tot_size)
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local dsize_4=$((tot_size_4 - buf0size_4))
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((dsize_4 == dsize))
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check_err $? "SPAN removed: Invisible buffers account for '$dsize_4', expected '== $dsize'"
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log_test "${what}internal buffer size"
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}
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test_tc_int_buf()
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{
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local cell_size=$(devlink_cell_size_get)
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local size=$((cell_size * 1000))
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tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M
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test_int_buf "TC: "
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dcb buffer set dev $swp buffer-size all:0 0:$size
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test_int_buf "TC+buffsize: "
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dcb buffer set dev $swp buffer-size all:0
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tc qdisc delete dev $swp root
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}
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bail_on_lldpad
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trap cleanup EXIT
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setup_wait
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tests_run
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exit $EXIT_STATUS
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