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selftests: netdevsim: Add test for FIB offload API
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Test various aspects of the FIB offload API on top of the netdevsim
implementation. Both good and bad flows are tested.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Ido Schimmel authored and David S. Miller committed Jan 15, 2020
1 parent c662455 commit ffdc514
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341 changes: 341 additions & 0 deletions tools/testing/selftests/drivers/net/netdevsim/fib.sh
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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# This test is for checking the FIB offload API. It makes use of netdevsim
# which registers a listener to the FIB notification chain.

lib_dir=$(dirname $0)/../../../net/forwarding

ALL_TESTS="
ipv4_identical_routes
ipv4_tos
ipv4_metric
ipv4_replace
ipv4_delete
ipv4_plen
ipv4_replay
ipv4_flush
ipv4_error_path
ipv6_add
ipv6_metric
ipv6_append_single
ipv6_replace_single
ipv6_metric_multipath
ipv6_append_multipath
ipv6_replace_multipath
ipv6_append_multipath_to_single
ipv6_delete_single
ipv6_delete_multipath
ipv6_replay_single
ipv6_replay_multipath
ipv6_error_path
"
NETDEVSIM_PATH=/sys/bus/netdevsim/
DEV_ADDR=1337
DEV=netdevsim${DEV_ADDR}
DEVLINK_DEV=netdevsim/${DEV}
SYSFS_NET_DIR=/sys/bus/netdevsim/devices/$DEV/net/
NUM_NETIFS=0
source $lib_dir/lib.sh
source $lib_dir/devlink_lib.sh
source $lib_dir/fib_offload_lib.sh

ipv4_identical_routes()
{
fib_ipv4_identical_routes_test "testns1"
}

ipv4_tos()
{
fib_ipv4_tos_test "testns1"
}

ipv4_metric()
{
fib_ipv4_metric_test "testns1"
}

ipv4_replace()
{
fib_ipv4_replace_test "testns1"
}

ipv4_delete()
{
fib_ipv4_delete_test "testns1"
}

ipv4_plen()
{
fib_ipv4_plen_test "testns1"
}

ipv4_replay_metric()
{
fib_ipv4_replay_metric_test "testns1" "$DEVLINK_DEV"
}

ipv4_replay_tos()
{
fib_ipv4_replay_tos_test "testns1" "$DEVLINK_DEV"
}

ipv4_replay_plen()
{
fib_ipv4_replay_plen_test "testns1" "$DEVLINK_DEV"
}

ipv4_replay()
{
ipv4_replay_metric
ipv4_replay_tos
ipv4_replay_plen
}

ipv4_flush()
{
fib_ipv4_flush_test "testns1"
}

ipv4_error_path_add()
{
local lsb

RET=0

ip -n testns1 link add name dummy1 type dummy
ip -n testns1 link set dev dummy1 up

devlink -N testns1 resource set $DEVLINK_DEV path IPv4/fib size 10
devlink -N testns1 dev reload $DEVLINK_DEV

for lsb in $(seq 1 20); do
ip -n testns1 route add 192.0.2.${lsb}/32 dev dummy1 \
&> /dev/null
done

log_test "IPv4 error path - add"

ip -n testns1 link del dev dummy1
}

ipv4_error_path_replay()
{
local lsb

RET=0

ip -n testns1 link add name dummy1 type dummy
ip -n testns1 link set dev dummy1 up

devlink -N testns1 resource set $DEVLINK_DEV path IPv4/fib size 100
devlink -N testns1 dev reload $DEVLINK_DEV

for lsb in $(seq 1 20); do
ip -n testns1 route add 192.0.2.${lsb}/32 dev dummy1
done

devlink -N testns1 resource set $DEVLINK_DEV path IPv4/fib size 10
devlink -N testns1 dev reload $DEVLINK_DEV &> /dev/null

log_test "IPv4 error path - replay"

ip -n testns1 link del dev dummy1

# Successfully reload after deleting all the routes.
devlink -N testns1 resource set $DEVLINK_DEV path IPv4/fib size 100
devlink -N testns1 dev reload $DEVLINK_DEV
}

ipv4_error_path()
{
# Test the different error paths of the notifiers by limiting the size
# of the "IPv4/fib" resource.
ipv4_error_path_add
ipv4_error_path_replay
}

ipv6_add()
{
fib_ipv6_add_test "testns1"
}

ipv6_metric()
{
fib_ipv6_metric_test "testns1"
}

ipv6_append_single()
{
fib_ipv6_append_single_test "testns1"
}

ipv6_replace_single()
{
fib_ipv6_replace_single_test "testns1"
}

ipv6_metric_multipath()
{
fib_ipv6_metric_multipath_test "testns1"
}

ipv6_append_multipath()
{
fib_ipv6_append_multipath_test "testns1"
}

ipv6_replace_multipath()
{
fib_ipv6_replace_multipath_test "testns1"
}

ipv6_append_multipath_to_single()
{
fib_ipv6_append_multipath_to_single_test "testns1"
}

ipv6_delete_single()
{
fib_ipv6_delete_single_test "testns1"
}

ipv6_delete_multipath()
{
fib_ipv6_delete_multipath_test "testns1"
}

ipv6_replay_single()
{
fib_ipv6_replay_single_test "testns1" "$DEVLINK_DEV"
}

ipv6_replay_multipath()
{
fib_ipv6_replay_multipath_test "testns1" "$DEVLINK_DEV"
}

ipv6_error_path_add_single()
{
local lsb

RET=0

ip -n testns1 link add name dummy1 type dummy
ip -n testns1 link set dev dummy1 up

devlink -N testns1 resource set $DEVLINK_DEV path IPv6/fib size 10
devlink -N testns1 dev reload $DEVLINK_DEV

for lsb in $(seq 1 20); do
ip -n testns1 route add 2001:db8:1::${lsb}/128 dev dummy1 \
&> /dev/null
done

log_test "IPv6 error path - add single"

ip -n testns1 link del dev dummy1
}

ipv6_error_path_add_multipath()
{
local lsb

RET=0

for i in $(seq 1 2); do
ip -n testns1 link add name dummy$i type dummy
ip -n testns1 link set dev dummy$i up
ip -n testns1 address add 2001:db8:$i::1/64 dev dummy$i
done

devlink -N testns1 resource set $DEVLINK_DEV path IPv6/fib size 10
devlink -N testns1 dev reload $DEVLINK_DEV

for lsb in $(seq 1 20); do
ip -n testns1 route add 2001:db8:10::${lsb}/128 \
nexthop via 2001:db8:1::2 dev dummy1 \
nexthop via 2001:db8:2::2 dev dummy2 &> /dev/null
done

log_test "IPv6 error path - add multipath"

for i in $(seq 1 2); do
ip -n testns1 link del dev dummy$i
done
}

ipv6_error_path_replay()
{
local lsb

RET=0

ip -n testns1 link add name dummy1 type dummy
ip -n testns1 link set dev dummy1 up

devlink -N testns1 resource set $DEVLINK_DEV path IPv6/fib size 100
devlink -N testns1 dev reload $DEVLINK_DEV

for lsb in $(seq 1 20); do
ip -n testns1 route add 2001:db8:1::${lsb}/128 dev dummy1
done

devlink -N testns1 resource set $DEVLINK_DEV path IPv6/fib size 10
devlink -N testns1 dev reload $DEVLINK_DEV &> /dev/null

log_test "IPv6 error path - replay"

ip -n testns1 link del dev dummy1

# Successfully reload after deleting all the routes.
devlink -N testns1 resource set $DEVLINK_DEV path IPv6/fib size 100
devlink -N testns1 dev reload $DEVLINK_DEV
}

ipv6_error_path()
{
# Test the different error paths of the notifiers by limiting the size
# of the "IPv6/fib" resource.
ipv6_error_path_add_single
ipv6_error_path_add_multipath
ipv6_error_path_replay
}

setup_prepare()
{
local netdev

modprobe netdevsim &> /dev/null

echo "$DEV_ADDR 1" > ${NETDEVSIM_PATH}/new_device
while [ ! -d $SYSFS_NET_DIR ] ; do :; done

ip netns add testns1
if [ $? -ne 0 ]; then
echo "Failed to add netns \"testns1\""
exit 1
fi

devlink dev reload $DEVLINK_DEV netns testns1
if [ $? -ne 0 ]; then
echo "Failed to reload into netns \"testns1\""
exit 1
fi
}

cleanup()
{
pre_cleanup
ip netns del testns1
echo "$DEV_ADDR" > ${NETDEVSIM_PATH}/del_device
modprobe -r netdevsim &> /dev/null
}

trap cleanup EXIT

setup_prepare

tests_run

exit $EXIT_STATUS

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