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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
# Test for resource limit of offloaded flower rules. The test adds a given
# number of flower matches for different IPv6 addresses, then generates traffic,
# and ensures each was hit exactly once. This file contains functions to set up
# a testing topology and run the test, and is meant to be sourced from a test
# script that calls the testing routine with a given number of rules.
TC_FLOWER_NUM_NETIFS=2
tc_flower_h1_create()
{
simple_if_init $h1
tc qdisc add dev $h1 clsact
}
tc_flower_h1_destroy()
{
tc qdisc del dev $h1 clsact
simple_if_fini $h1
}
tc_flower_h2_create()
{
simple_if_init $h2
tc qdisc add dev $h2 clsact
}
tc_flower_h2_destroy()
{
tc qdisc del dev $h2 clsact
simple_if_fini $h2
}
tc_flower_setup_prepare()
{
h1=${NETIFS[p1]}
h2=${NETIFS[p2]}
vrf_prepare
tc_flower_h1_create
tc_flower_h2_create
}
tc_flower_cleanup()
{
pre_cleanup
tc_flower_h2_destroy
tc_flower_h1_destroy
vrf_cleanup
if [[ -v TC_FLOWER_BATCH_FILE ]]; then
rm -f $TC_FLOWER_BATCH_FILE
fi
}
tc_flower_addr()
{
local num=$1; shift
printf "2001:db8:1::%x" $num
}
tc_flower_rules_create()
{
local count=$1; shift
local should_fail=$1; shift
TC_FLOWER_BATCH_FILE="$(mktemp)"
for ((i = 0; i < count; ++i)); do
cat >> $TC_FLOWER_BATCH_FILE <<-EOF
filter add dev $h2 ingress \
prot ipv6 \
pref 1000 \
flower $tcflags dst_ip $(tc_flower_addr $i) \
action drop
EOF
done
tc -b $TC_FLOWER_BATCH_FILE
check_err_fail $should_fail $? "Rule insertion"
}
__tc_flower_test()
{
local count=$1; shift
local should_fail=$1; shift
local last=$((count - 1))
tc_flower_rules_create $count $should_fail
for ((i = 0; i < count; ++i)); do
$MZ $h1 -q -c 1 -t ip -p 20 -b bc -6 \
-A 2001:db8:2::1 \
-B $(tc_flower_addr $i)
done
MISMATCHES=$(
tc -j -s filter show dev $h2 ingress |
jq -r '[ .[] | select(.kind == "flower") | .options |
values as $rule | .actions[].stats.packets |
select(. != 1) | "\(.) on \($rule.keys.dst_ip)" ] |
join(", ")'
)
test -z "$MISMATCHES"
check_err $? "Expected to capture 1 packet for each IP, but got $MISMATCHES"
}
tc_flower_test()
{
local count=$1; shift
local should_fail=$1; shift
# We use lower 16 bits of IPv6 address for match. Also there are only 16
# bits of rule priority space.
if ((count > 65536)); then
check_err 1 "Invalid count of $count. At most 65536 rules supported"
return
fi
if ! tc_offload_check $TC_FLOWER_NUM_NETIFS; then
check_err 1 "Could not test offloaded functionality"
return
fi
tcflags="skip_sw"
__tc_flower_test $count $should_fail
}
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