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selftests: forwarding: Add libs for gretap mirror testing

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To simplify implementation of mirror-to-gretap tests, extend lib.sh with
several new functions that might potentially be useful more
broadly (although right now the mirroring tests will be the only
client).

Also add mirror_lib.sh with code useful for mirroring tests,
mirror_gre_lib.sh with code specifically useful for mirror-to-gretap
tests, and mirror_gre_topo.sh that primes a given test with a good
baseline topology that the test can then tweak to its liking.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata 2018-04-27 01:17:56 +02:00 committed by David S. Miller
parent 6a26ef9bf4
commit 7d4cbae04f
4 changed files with 350 additions and 0 deletions
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96
tools/testing/selftests/net/forwarding/lib.sh
View file

@ -321,6 +321,25 @@ simple_if_fini()
vrf_destroy $vrf_name
}
tunnel_create()
{
local name=$1; shift
local type=$1; shift
local local=$1; shift
local remote=$1; shift
ip link add name $name type $type \
local $local remote $remote "$@"
ip link set dev $name up
}
tunnel_destroy()
{
local name=$1; shift
ip link del dev $name
}
master_name_get()
{
local if_name=$1
@ -335,6 +354,15 @@ link_stats_tx_packets_get()
ip -j -s link show dev $if_name | jq '.[]["stats64"]["tx"]["packets"]'
}
tc_rule_stats_get()
{
local dev=$1; shift
local pref=$1; shift
tc -j -s filter show dev $dev ingress pref $pref |
jq '.[1].options.actions[].stats.packets'
}
mac_get()
{
local if_name=$1
@ -381,6 +409,74 @@ tc_offload_check()
return 0
}
slow_path_trap_install()
{
local dev=$1; shift
local direction=$1; shift
if [ "${tcflags/skip_hw}" != "$tcflags" ]; then
# For slow-path testing, we need to install a trap to get to
# slow path the packets that would otherwise be switched in HW.
tc filter add dev $dev $direction pref 1 \
flower skip_sw action trap
fi
}
slow_path_trap_uninstall()
{
local dev=$1; shift
local direction=$1; shift
if [ "${tcflags/skip_hw}" != "$tcflags" ]; then
tc filter del dev $dev $direction pref 1 flower skip_sw
fi
}
__icmp_capture_add_del()
{
local add_del=$1; shift
local pref=$1; shift
local vsuf=$1; shift
local tundev=$1; shift
local filter=$1; shift
tc filter $add_del dev "$tundev" ingress \
proto ip$vsuf pref $pref \
flower ip_proto icmp$vsuf $filter \
action pass
}
icmp_capture_install()
{
__icmp_capture_add_del add 100 "" "$@"
}
icmp_capture_uninstall()
{
__icmp_capture_add_del del 100 "" "$@"
}
icmp6_capture_install()
{
__icmp_capture_add_del add 100 v6 "$@"
}
icmp6_capture_uninstall()
{
__icmp_capture_add_del del 100 v6 "$@"
}
matchall_sink_create()
{
local dev=$1; shift
tc qdisc add dev $dev clsact
tc filter add dev $dev ingress \
pref 10000 \
matchall \
action drop
}
##############################################################################
# Tests

85
tools/testing/selftests/net/forwarding/mirror_gre_lib.sh Normal file
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@ -0,0 +1,85 @@
# SPDX-License-Identifier: GPL-2.0
do_test_span_gre_dir_ips()
{
local expect=$1; shift
local tundev=$1; shift
local direction=$1; shift
local ip1=$1; shift
local ip2=$1; shift
icmp_capture_install h3-$tundev
mirror_test v$h1 $ip1 $ip2 h3-$tundev 100 $expect
mirror_test v$h2 $ip2 $ip1 h3-$tundev 100 $expect
icmp_capture_uninstall h3-$tundev
}
quick_test_span_gre_dir_ips()
{
do_test_span_gre_dir_ips 10 "$@"
}
fail_test_span_gre_dir_ips()
{
do_test_span_gre_dir_ips 0 "$@"
}
test_span_gre_dir_ips()
{
local tundev=$1; shift
local direction=$1; shift
local forward_type=$1; shift
local backward_type=$1; shift
local ip1=$1; shift
local ip2=$1; shift
quick_test_span_gre_dir_ips "$tundev" "$direction" "$ip1" "$ip2"
icmp_capture_install h3-$tundev "type $forward_type"
mirror_test v$h1 $ip1 $ip2 h3-$tundev 100 10
icmp_capture_uninstall h3-$tundev
icmp_capture_install h3-$tundev "type $backward_type"
mirror_test v$h2 $ip2 $ip1 h3-$tundev 100 10
icmp_capture_uninstall h3-$tundev
}
full_test_span_gre_dir_ips()
{
local tundev=$1; shift
local direction=$1; shift
local forward_type=$1; shift
local backward_type=$1; shift
local what=$1; shift
local ip1=$1; shift
local ip2=$1; shift
RET=0
mirror_install $swp1 $direction $tundev "matchall $tcflags"
test_span_gre_dir_ips "$tundev" "$direction" "$forward_type" \
"$backward_type" "$ip1" "$ip2"
mirror_uninstall $swp1 $direction
log_test "$direction $what ($tcflags)"
}
quick_test_span_gre_dir()
{
quick_test_span_gre_dir_ips "$@" 192.0.2.1 192.0.2.2
}
fail_test_span_gre_dir()
{
fail_test_span_gre_dir_ips "$@" 192.0.2.1 192.0.2.2
}
test_span_gre_dir()
{
test_span_gre_dir_ips "$@" 192.0.2.1 192.0.2.2
}
full_test_span_gre_dir()
{
full_test_span_gre_dir_ips "$@" 192.0.2.1 192.0.2.2
}

129
tools/testing/selftests/net/forwarding/mirror_gre_topo_lib.sh Normal file
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@ -0,0 +1,129 @@
# SPDX-License-Identifier: GPL-2.0
# This is the standard topology for testing mirroring to gretap and ip6gretap
# netdevices. The tests that use it tweak it in one way or another--importantly,
# $swp3 and $h3 need to have addresses set up.
#
# +---------------------+ +---------------------+
# | H1 | | H2 |
# | + $h1 | | $h2 + |
# | | 192.0.2.1/28 | | 192.0.2.2/28 | |
# +-----|---------------+ +---------------|-----+
# | |
# +-----|-------------------------------------------------------------|-----+
# | SW o--> mirror | |
# | +---|-------------------------------------------------------------|---+ |
# | | + $swp1 BR $swp2 + | |
# | +---------------------------------------------------------------------+ |
# | |
# | + $swp3 + gt6 (ip6gretap) + gt4 (gretap) |
# | | : loc=2001:db8:2::1 : loc=192.0.2.129 |
# | | : rem=2001:db8:2::2 : rem=192.0.2.130 |
# | | : ttl=100 : ttl=100 |
# | | : tos=inherit : tos=inherit |
# | | : : |
# +-----|---------------------:----------------------:----------------------+
# | : :
# +-----|---------------------:----------------------:----------------------+
# | H3 + $h3 + h3-gt6 (ip6gretap) + h3-gt4 (gretap) |
# | loc=2001:db8:2::2 loc=192.0.2.130 |
# | rem=2001:db8:2::1 rem=192.0.2.129 |
# | ttl=100 ttl=100 |
# | tos=inherit tos=inherit |
# | |
# +-------------------------------------------------------------------------+
mirror_gre_topo_h1_create()
{
simple_if_init $h1 192.0.2.1/28
}
mirror_gre_topo_h1_destroy()
{
simple_if_fini $h1 192.0.2.1/28
}
mirror_gre_topo_h2_create()
{
simple_if_init $h2 192.0.2.2/28
}
mirror_gre_topo_h2_destroy()
{
simple_if_fini $h2 192.0.2.2/28
}
mirror_gre_topo_h3_create()
{
simple_if_init $h3
tunnel_create h3-gt4 gretap 192.0.2.130 192.0.2.129
ip link set h3-gt4 vrf v$h3
matchall_sink_create h3-gt4
tunnel_create h3-gt6 ip6gretap 2001:db8:2::2 2001:db8:2::1
ip link set h3-gt6 vrf v$h3
matchall_sink_create h3-gt6
}
mirror_gre_topo_h3_destroy()
{
tunnel_destroy h3-gt6
tunnel_destroy h3-gt4
simple_if_fini $h3
}
mirror_gre_topo_switch_create()
{
ip link set dev $swp3 up
ip link add name br1 type bridge vlan_filtering 1
ip link set dev br1 up
ip link set dev $swp1 master br1
ip link set dev $swp1 up
ip link set dev $swp2 master br1
ip link set dev $swp2 up
tunnel_create gt4 gretap 192.0.2.129 192.0.2.130 \
ttl 100 tos inherit
tunnel_create gt6 ip6gretap 2001:db8:2::1 2001:db8:2::2 \
ttl 100 tos inherit allow-localremote
tc qdisc add dev $swp1 clsact
}
mirror_gre_topo_switch_destroy()
{
tc qdisc del dev $swp1 clsact
tunnel_destroy gt6
tunnel_destroy gt4
ip link set dev $swp1 down
ip link set dev $swp2 down
ip link del dev br1
ip link set dev $swp3 down
}
mirror_gre_topo_create()
{
mirror_gre_topo_h1_create
mirror_gre_topo_h2_create
mirror_gre_topo_h3_create
mirror_gre_topo_switch_create
}
mirror_gre_topo_destroy()
{
mirror_gre_topo_switch_destroy
mirror_gre_topo_h3_destroy
mirror_gre_topo_h2_destroy
mirror_gre_topo_h1_destroy
}

40
tools/testing/selftests/net/forwarding/mirror_lib.sh Normal file
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@ -0,0 +1,40 @@
# SPDX-License-Identifier: GPL-2.0
mirror_install()
{
local from_dev=$1; shift
local direction=$1; shift
local to_dev=$1; shift
local filter=$1; shift
tc filter add dev $from_dev $direction \
pref 1000 $filter \
action mirred egress mirror dev $to_dev
}
mirror_uninstall()
{
local from_dev=$1; shift
local direction=$1; shift
tc filter del dev $swp1 $direction pref 1000
}
mirror_test()
{
local vrf_name=$1; shift
local sip=$1; shift
local dip=$1; shift
local dev=$1; shift
local pref=$1; shift
local expect=$1; shift
local t0=$(tc_rule_stats_get $dev $pref)
ip vrf exec $vrf_name \
${PING} ${sip:+-I $sip} $dip -c 10 -i 0.1 -w 2 &> /dev/null
local t1=$(tc_rule_stats_get $dev $pref)
local delta=$((t1 - t0))
# Tolerate a couple stray extra packets.
((expect <= delta && delta <= expect + 2))
check_err $? "Expected to capture $expect packets, got $delta."
}