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selftests: fib_tests: Add a test case for IPv6 garbage collection

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Add 1000 IPv6 routes with expiration time (w/ and w/o additional 5000
permanet routes in the background.)  Wait for a few seconds to make sure
they are removed correctly.

The expected output of the test looks like the following example.

> Fib6 garbage collection test
>     TEST: ipv6 route garbage collection [ OK ]

Signed-off-by: Kui-Feng Lee <thinker.li@gmail.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kui-Feng Lee 2023-08-15 11:07:06 -07:00 committed by David S. Miller
parent 3dec89b14d
commit a63e10da42
1 changed files with 69 additions and 3 deletions
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72
tools/testing/selftests/net/fib_tests.sh
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@ -9,13 +9,16 @@ ret=0
ksft_skip=4
# all tests in this script. Can be overridden with -t option
TESTS="unregister down carrier nexthop suppress ipv6_notify ipv4_notify ipv6_rt ipv4_rt ipv6_addr_metric ipv4_addr_metric ipv6_route_metrics ipv4_route_metrics ipv4_route_v6_gw rp_filter ipv4_del_addr ipv4_mangle ipv6_mangle ipv4_bcast_neigh"
TESTS="unregister down carrier nexthop suppress ipv6_notify ipv4_notify \
ipv6_rt ipv4_rt ipv6_addr_metric ipv4_addr_metric ipv6_route_metrics \
ipv4_route_metrics ipv4_route_v6_gw rp_filter ipv4_del_addr \
ipv4_mangle ipv6_mangle ipv4_bcast_neigh fib6_gc_test"
VERBOSE=0
PAUSE_ON_FAIL=no
PAUSE=no
IP="ip -netns ns1"
NS_EXEC="ip netns exec ns1"
IP="$(which ip) -netns ns1"
NS_EXEC="$(which ip) netns exec ns1"
which ping6 > /dev/null 2>&1 && ping6=$(which ping6) || ping6=$(which ping)
@ -747,6 +750,68 @@ fib_notify_test()
cleanup &> /dev/null
}
fib6_gc_test()
{
setup
echo
echo "Fib6 garbage collection test"
set -e
EXPIRE=3
# Check expiration of routes every $EXPIRE seconds (GC)
$NS_EXEC sysctl -wq net.ipv6.route.gc_interval=$EXPIRE
$IP link add dummy_10 type dummy
$IP link set dev dummy_10 up
$IP -6 address add 2001:10::1/64 dev dummy_10
$NS_EXEC sysctl -wq net.ipv6.route.flush=1
# Temporary routes
for i in $(seq 1 1000); do
# Expire route after $EXPIRE seconds
$IP -6 route add 2001:20::$i \
via 2001:10::2 dev dummy_10 expires $EXPIRE
done
sleep $(($EXPIRE * 2))
N_EXP_SLEEP=$($IP -6 route list |grep expires|wc -l)
if [ $N_EXP_SLEEP -ne 0 ]; then
echo "FAIL: expected 0 routes with expires, got $N_EXP_SLEEP"
ret=1
else
ret=0
fi
# Permanent routes
for i in $(seq 1 5000); do
$IP -6 route add 2001:30::$i \
via 2001:10::2 dev dummy_10
done
# Temporary routes
for i in $(seq 1 1000); do
# Expire route after $EXPIRE seconds
$IP -6 route add 2001:20::$i \
via 2001:10::2 dev dummy_10 expires $EXPIRE
done
sleep $(($EXPIRE * 2))
N_EXP_SLEEP=$($IP -6 route list |grep expires|wc -l)
if [ $N_EXP_SLEEP -ne 0 ]; then
echo "FAIL: expected 0 routes with expires," \
"got $N_EXP_SLEEP (5000 permanent routes)"
ret=1
else
ret=0
fi
set +e
log_test $ret 0 "ipv6 route garbage collection"
cleanup &> /dev/null
}
fib_suppress_test()
{
echo
@ -2217,6 +2282,7 @@ do
ipv4_mangle) ipv4_mangle_test;;
ipv6_mangle) ipv6_mangle_test;;
ipv4_bcast_neigh) ipv4_bcast_neigh_test;;
fib6_gc_test|ipv6_gc) fib6_gc_test;;
help) echo "Test names: $TESTS"; exit 0;;
esac