Commit e6b43d85 authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'selftests-Add-tests-for-mirroring-to-gretap' 



Petr Machata says:

====================
selftests: Add tests for mirroring to gretap

This suite tests GRE-encapsulated mirroring. The general topology that
most of the tests use is as follows, but each test defines details of
the topology based on its needs, and some tests actually use a somewhat
different topology.

+---------------------+                      +---------------------+
| H1                  |                      |                  H2 |
|     + $h1           |                      |           $h2 +     |
+-----|---------------+                      +---------------|-----+
      |                                                      |
+-----|------------------------------------------------------|-----+
| SW  o---> mirror                                           |     |
| +---|------------------------------------------------------|---+ |
| |   + $swp1               BR                         $swp2 +   | |
| +--------------------------------------------------------------+ |
|                                                                  |
|     + $swp3          + gt6 (ip6gretap)    + gt4 (gretap)         |
+-----|----------------:--------------------:----------------------+
      |                :                    :
+-----|----------------:--------------------:----------------------+
|     + $h3            + h3-gt6(ip6gretap)  + h3-gt4 (gretap)      |
| H3                                                               |
+------------------------------------------------------------------+

The following axes of configuration space are tested:

- ingress and egress mirroring
- mirroring triggered by matchall and flower
- mirroring to ipgretap and ip6gretap
- remote tunnel reachable directly or through a next-hop route
- skip_sw as well as skip_hw configurations

Apart from basic tests with the above mentioned features, the following
tests are included:

- handling of changes to neighbors pertinent to routing decisions in
  mirrored underlay
- handling of configuration changes at the mirrored-to tunnel (endpoint
  addresses, upness)

A suite of mlxsw-specific tests will be part of a separate submission
through linux-mlxsw patch queue.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 6a26ef9b 45315673

tools/testing/selftests/net/forwarding/lib.sh

+96 −0
Original line number Diff line number Diff line
@@ -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

tools/testing/selftests/net/forwarding/mirror_gre.sh

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Original line number Diff line number Diff line 
#!/bin/bash

# SPDX-License-Identifier: GPL-2.0



# This test uses standard topology for testing gretap. See

# mirror_gre_topo_lib.sh for more details.

#

# Test for "tc action mirred egress mirror" when the device to mirror to is a

# gretap or ip6gretap netdevice. Expect that the packets come out encapsulated,

# and another gretap / ip6gretap netdevice is then capable of decapsulating the

# traffic. Test that the payload is what is expected (ICMP ping request or

# reply, depending on test).



NUM_NETIFS=6

source lib.sh

source mirror_lib.sh

source mirror_gre_lib.sh

source mirror_gre_topo_lib.sh



setup_prepare()

{

	h1=${NETIFS[p1]}

	swp1=${NETIFS[p2]}



	swp2=${NETIFS[p3]}

	h2=${NETIFS[p4]}



	swp3=${NETIFS[p5]}

	h3=${NETIFS[p6]}



	vrf_prepare

	mirror_gre_topo_create



	ip address add dev $swp3 192.0.2.129/28

	ip address add dev $h3 192.0.2.130/28



	ip address add dev $swp3 2001:db8:2::1/64

	ip address add dev $h3 2001:db8:2::2/64

}



cleanup()

{

	pre_cleanup



	ip address del dev $h3 2001:db8:2::2/64

	ip address del dev $swp3 2001:db8:2::1/64



	ip address del dev $h3 192.0.2.130/28

	ip address del dev $swp3 192.0.2.129/28



	mirror_gre_topo_destroy

	vrf_cleanup

}



test_span_gre_mac()

{

	local tundev=$1; shift

	local direction=$1; shift

	local prot=$1; shift

	local what=$1; shift



	local swp3mac=$(mac_get $swp3)

	local h3mac=$(mac_get $h3)



	RET=0



	mirror_install $swp1 $direction $tundev "matchall $tcflags"

	tc qdisc add dev $h3 clsact

	tc filter add dev $h3 ingress pref 77 prot $prot \

		flower ip_proto 0x2f src_mac $swp3mac dst_mac $h3mac \

		action pass



	mirror_test v$h1 192.0.2.1 192.0.2.2 $h3 77 10



	tc filter del dev $h3 ingress pref 77

	tc qdisc del dev $h3 clsact

	mirror_uninstall $swp1 $direction



	log_test "$direction $what: envelope MAC ($tcflags)"

}



test_two_spans()

{

	RET=0



	mirror_install $swp1 ingress gt4 "matchall $tcflags"

	mirror_install $swp1 egress gt6 "matchall $tcflags"

	quick_test_span_gre_dir gt4 ingress

	quick_test_span_gre_dir gt6 egress



	mirror_uninstall $swp1 ingress

	fail_test_span_gre_dir gt4 ingress

	quick_test_span_gre_dir gt6 egress



	mirror_install $swp1 ingress gt4 "matchall $tcflags"

	mirror_uninstall $swp1 egress

	quick_test_span_gre_dir gt4 ingress

	fail_test_span_gre_dir gt6 egress



	mirror_uninstall $swp1 ingress

	log_test "two simultaneously configured mirrors ($tcflags)"

}



test_all()

{

	slow_path_trap_install $swp1 ingress

	slow_path_trap_install $swp1 egress



	full_test_span_gre_dir gt4 ingress 8 0 "mirror to gretap"

	full_test_span_gre_dir gt6 ingress 8 0 "mirror to ip6gretap"

	full_test_span_gre_dir gt4 egress 0 8 "mirror to gretap"

	full_test_span_gre_dir gt6 egress 0 8 "mirror to ip6gretap"



	test_span_gre_mac gt4 ingress ip "mirror to gretap"

	test_span_gre_mac gt6 ingress ipv6 "mirror to ip6gretap"

	test_span_gre_mac gt4 egress ip "mirror to gretap"

	test_span_gre_mac gt6 egress ipv6 "mirror to ip6gretap"



	test_two_spans



	slow_path_trap_uninstall $swp1 egress

	slow_path_trap_uninstall $swp1 ingress

}



trap cleanup EXIT



setup_prepare

setup_wait



tcflags="skip_hw"

test_all



if ! tc_offload_check; then

	echo "WARN: Could not test offloaded functionality"

else

	tcflags="skip_sw"

	test_all

fi



exit $EXIT_STATUS

tools/testing/selftests/net/forwarding/mirror_gre_bound.sh

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Original line number Diff line number Diff line 
#!/bin/bash

# SPDX-License-Identifier: GPL-2.0



#   +---------------------+                             +---------------------+

#   | H1                  |                             |                  H2 |

#   |     + $h1           |                             |           $h2 +     |

#   |     | 192.0.2.1/28  |                             |  192.0.2.2/28 |     |

#   +-----|---------------+                             +---------------|-----+

#         |                                                             |

#   +-----|-------------------------------------------------------------|-----+

#   | SW  o--> mirror                                                   |     |

#   | +---|-------------------------------------------------------------|---+ |

#   | |   + $swp1                    BR                           $swp2 +   | |

#   | +---------------------------------------------------------------------+ |

#   |                                                                         |

#   | +---------------------------------------------------------------------+ |

#   | | OL                      + 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        | |

#   | +-------------------------:--|-------------------:--|-----------------+ |

#   |                           :  |                   :  |                   |

#   | +-------------------------:--|-------------------:--|-----------------+ |

#   | | UL                      :  |,---------------------'                 | |

#   | |   + $swp3               :  ||                  :                    | |

#   | |   | 192.0.2.129/28      :  vv                  :                    | |

#   | |   | 2001:db8:2::1/64    :  + ul (dummy)        :                    | |

#   | +---|---------------------:----------------------:--------------------+ |

#   +-----|---------------------:----------------------:----------------------+

#         |                     :                      :

#   +-----|---------------------:----------------------:----------------------+

#   | H3  + $h3                 + h3-gt6 (ip6gretap)   + h3-gt4 (gretap)      |

#   |       192.0.2.130/28        loc=2001:db8:2::2      loc=192.0.2.130      |

#   |       2001:db8:2::2/64      rem=2001:db8:2::1      rem=192.0.2.129      |

#   |                             ttl=100                ttl=100              |

#   |                             tos=inherit            tos=inherit          |

#   |                                                                         |

#   +-------------------------------------------------------------------------+

#

# This tests mirroring to gretap and ip6gretap configured in an overlay /

# underlay manner, i.e. with a bound dummy device that marks underlay VRF where

# the encapsulated packed should be routed.



NUM_NETIFS=6

source lib.sh

source mirror_lib.sh

source mirror_gre_lib.sh



h1_create()

{

	simple_if_init $h1 192.0.2.1/28

}



h1_destroy()

{

	simple_if_fini $h1 192.0.2.1/28

}



h2_create()

{

	simple_if_init $h2 192.0.2.2/28

}



h2_destroy()

{

	simple_if_fini $h2 192.0.2.2/28

}



h3_create()

{

	simple_if_init $h3 192.0.2.130/28 2001:db8:2::2/64



	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

}



h3_destroy()

{

	tunnel_destroy h3-gt6

	tunnel_destroy h3-gt4



	simple_if_fini $h3 192.0.2.130/28 2001:db8:2::2/64

}



switch_create()

{

	# Bridge between H1 and H2.



	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



	tc qdisc add dev $swp1 clsact



	# Underlay.



	simple_if_init $swp3 192.0.2.129/28 2001:db8:2::1/64



	ip link add name ul type dummy

	ip link set dev ul master v$swp3

	ip link set dev ul up



	# Overlay.



	vrf_create vrf-ol

	ip link set dev vrf-ol up



	tunnel_create gt4 gretap 192.0.2.129 192.0.2.130 \

		      ttl 100 tos inherit dev ul

	ip link set dev gt4 master vrf-ol

	ip link set dev gt4 up



	tunnel_create gt6 ip6gretap 2001:db8:2::1 2001:db8:2::2 \

		      ttl 100 tos inherit dev ul allow-localremote

	ip link set dev gt6 master vrf-ol

	ip link set dev gt6 up

}



switch_destroy()

{

	vrf_destroy vrf-ol



	tunnel_destroy gt6

	tunnel_destroy gt4



	simple_if_fini $swp3 192.0.2.129/28 2001:db8:2::1/64



	ip link del dev ul



	tc qdisc del dev $swp1 clsact



	ip link set dev $swp1 down

	ip link set dev $swp2 down

	ip link del dev br1

}



setup_prepare()

{

	h1=${NETIFS[p1]}

	swp1=${NETIFS[p2]}



	swp2=${NETIFS[p3]}

	h2=${NETIFS[p4]}



	swp3=${NETIFS[p5]}

	h3=${NETIFS[p6]}



	vrf_prepare



	h1_create

	h2_create

	h3_create



	switch_create

}



cleanup()

{

	pre_cleanup



	switch_destroy



	h3_destroy

	h2_destroy

	h1_destroy



	vrf_cleanup

}



test_all()

{

	RET=0



	slow_path_trap_install $swp1 ingress

	slow_path_trap_install $swp1 egress



	full_test_span_gre_dir gt4 ingress 8 0 "mirror to gretap w/ UL"

	full_test_span_gre_dir gt6 ingress 8 0 "mirror to ip6gretap w/ UL"



	full_test_span_gre_dir gt4 egress  0 8 "mirror to gretap w/ UL"

	full_test_span_gre_dir gt6 egress  0 8 "mirror to ip6gretap w/ UL"



	slow_path_trap_uninstall $swp1 egress

	slow_path_trap_uninstall $swp1 ingress

}



trap cleanup EXIT



setup_prepare

setup_wait



tcflags="skip_hw"

test_all



if ! tc_offload_check; then

	echo "WARN: Could not test offloaded functionality"

else

	tcflags="skip_sw"

	test_all

fi



exit $EXIT_STATUS

tools/testing/selftests/net/forwarding/mirror_gre_changes.sh

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Original line number Diff line number Diff line 
#!/bin/bash

# SPDX-License-Identifier: GPL-2.0



# This test uses standard topology for testing gretap. See

# mirror_gre_topo_lib.sh for more details.

#

# Test how mirrors to gretap and ip6gretap react to changes to relevant

# configuration.



NUM_NETIFS=6

source lib.sh

source mirror_lib.sh

source mirror_gre_lib.sh

source mirror_gre_topo_lib.sh



setup_prepare()

{

	h1=${NETIFS[p1]}

	swp1=${NETIFS[p2]}



	swp2=${NETIFS[p3]}

	h2=${NETIFS[p4]}



	swp3=${NETIFS[p5]}

	h3=${NETIFS[p6]}



	vrf_prepare

	mirror_gre_topo_create



	# This test downs $swp3, which deletes the configured IPv6 address

	# unless this sysctl is set.

	local key=net.ipv6.conf.$swp3.keep_addr_on_down

	SWP3_KEEP_ADDR_ON_DOWN=$(sysctl -n $key)

	sysctl -qw $key=1



	ip address add dev $swp3 192.0.2.129/28

	ip address add dev $h3 192.0.2.130/28



	ip address add dev $swp3 2001:db8:2::1/64

	ip address add dev $h3 2001:db8:2::2/64

}



cleanup()

{

	pre_cleanup



	ip address del dev $h3 2001:db8:2::2/64

	ip address del dev $swp3 2001:db8:2::1/64



	ip address del dev $h3 192.0.2.130/28

	ip address del dev $swp3 192.0.2.129/28



	local key=net.ipv6.conf.$swp3.keep_addr_on_down

	sysctl -qw $key=$SWP3_KEEP_ADDR_ON_DOWN



	mirror_gre_topo_destroy

	vrf_cleanup

}



test_span_gre_ttl()

{

	local tundev=$1; shift

	local type=$1; shift

	local prot=$1; shift

	local what=$1; shift



	RET=0



	mirror_install $swp1 ingress $tundev "matchall $tcflags"

	tc qdisc add dev $h3 clsact

	tc filter add dev $h3 ingress pref 77 prot $prot \

		flower ip_ttl 50 action pass



	mirror_test v$h1 192.0.2.1 192.0.2.2 $h3 77 0



	ip link set dev $tundev type $type ttl 50

	mirror_test v$h1 192.0.2.1 192.0.2.2 $h3 77 10



	ip link set dev $tundev type $type ttl 100

	tc filter del dev $h3 ingress pref 77

	tc qdisc del dev $h3 clsact

	mirror_uninstall $swp1 ingress



	log_test "$what: TTL change ($tcflags)"

}



test_span_gre_tun_up()

{

	local tundev=$1; shift

	local what=$1; shift



	RET=0



	ip link set dev $tundev down

	mirror_install $swp1 ingress $tundev "matchall $tcflags"

	fail_test_span_gre_dir $tundev ingress



	ip link set dev $tundev up



	quick_test_span_gre_dir $tundev ingress

	mirror_uninstall $swp1 ingress



	log_test "$what: tunnel down/up ($tcflags)"

}



test_span_gre_egress_up()

{

	local tundev=$1; shift

	local remote_ip=$1; shift

	local what=$1; shift



	RET=0



	ip link set dev $swp3 down

	mirror_install $swp1 ingress $tundev "matchall $tcflags"

	fail_test_span_gre_dir $tundev ingress



	# After setting the device up, wait for neighbor to get resolved so that

	# we can expect mirroring to work.

	ip link set dev $swp3 up

	while true; do

		ip neigh sh dev $swp3 $remote_ip nud reachable |

		    grep -q ^

		if [[ $? -ne 0 ]]; then

			sleep 1

		else

			break

		fi

	done



	quick_test_span_gre_dir $tundev ingress

	mirror_uninstall $swp1 ingress



	log_test "$what: egress down/up ($tcflags)"

}



test_span_gre_remote_ip()

{

	local tundev=$1; shift

	local type=$1; shift

	local correct_ip=$1; shift

	local wrong_ip=$1; shift

	local what=$1; shift



	RET=0



	ip link set dev $tundev type $type remote $wrong_ip

	mirror_install $swp1 ingress $tundev "matchall $tcflags"

	fail_test_span_gre_dir $tundev ingress



	ip link set dev $tundev type $type remote $correct_ip

	quick_test_span_gre_dir $tundev ingress

	mirror_uninstall $swp1 ingress



	log_test "$what: remote address change ($tcflags)"

}



test_all()

{

	slow_path_trap_install $swp1 ingress

	slow_path_trap_install $swp1 egress



	test_span_gre_ttl gt4 gretap ip "mirror to gretap"

	test_span_gre_ttl gt6 ip6gretap ipv6 "mirror to ip6gretap"



	test_span_gre_tun_up gt4 "mirror to gretap"

	test_span_gre_tun_up gt6 "mirror to ip6gretap"



	test_span_gre_egress_up gt4 192.0.2.130 "mirror to gretap"

	test_span_gre_egress_up gt6 2001:db8:2::2 "mirror to ip6gretap"



	test_span_gre_remote_ip gt4 gretap 192.0.2.130 192.0.2.132 "mirror to gretap"

	test_span_gre_remote_ip gt6 ip6gretap 2001:db8:2::2 2001:db8:2::4 "mirror to ip6gretap"



	slow_path_trap_uninstall $swp1 egress

	slow_path_trap_uninstall $swp1 ingress

}



trap cleanup EXIT



setup_prepare

setup_wait



tcflags="skip_hw"

test_all



if ! tc_offload_check; then

	echo "WARN: Could not test offloaded functionality"

else

	tcflags="skip_sw"

	test_all

fi



exit $EXIT_STATUS

tools/testing/selftests/net/forwarding/mirror_gre_flower.sh

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Original line number Diff line number Diff line 
#!/bin/bash

# SPDX-License-Identifier: GPL-2.0



# This test uses standard topology for testing gretap. See

# mirror_gre_topo_lib.sh for more details.

#

# This tests flower-triggered mirroring to gretap and ip6gretap netdevices. The

# interfaces on H1 and H2 have two addresses each. Flower match on one of the

# addresses is configured with mirror action. It is expected that when pinging

# this address, mirroring takes place, whereas when pinging the other one,

# there's no mirroring.



NUM_NETIFS=6

source lib.sh

source mirror_lib.sh

source mirror_gre_lib.sh

source mirror_gre_topo_lib.sh



setup_prepare()

{

	h1=${NETIFS[p1]}

	swp1=${NETIFS[p2]}



	swp2=${NETIFS[p3]}

	h2=${NETIFS[p4]}



	swp3=${NETIFS[p5]}

	h3=${NETIFS[p6]}



	vrf_prepare

	mirror_gre_topo_create



	ip address add dev $swp3 192.0.2.129/28

	ip address add dev $h3 192.0.2.130/28



	ip address add dev $swp3 2001:db8:2::1/64

	ip address add dev $h3 2001:db8:2::2/64



	ip address add dev $h1 192.0.2.3/28

	ip address add dev $h2 192.0.2.4/28

}



cleanup()

{

	pre_cleanup



	ip address del dev $h2 192.0.2.4/28

	ip address del dev $h1 192.0.2.3/28



	ip address del dev $h3 2001:db8:2::2/64

	ip address del dev $swp3 2001:db8:2::1/64



	ip address del dev $h3 192.0.2.130/28

	ip address del dev $swp3 192.0.2.129/28



	mirror_gre_topo_destroy

	vrf_cleanup

}



test_span_gre_dir_acl()

{

	test_span_gre_dir_ips "$@" 192.0.2.3 192.0.2.4

}



full_test_span_gre_dir_acl()

{

	local tundev=$1; shift

	local direction=$1; shift

	local forward_type=$1; shift

	local backward_type=$1; shift

	local match_dip=$1; shift

	local what=$1; shift



	mirror_install $swp1 $direction $tundev \

		       "protocol ip flower $tcflags dst_ip $match_dip"

	fail_test_span_gre_dir $tundev $direction

	test_span_gre_dir_acl "$tundev" "$direction" \

			  "$forward_type" "$backward_type"

	mirror_uninstall $swp1 $direction



	log_test "$direction $what ($tcflags)"

}



test_all()

{

	RET=0



	slow_path_trap_install $swp1 ingress

	slow_path_trap_install $swp1 egress



	full_test_span_gre_dir_acl gt4 ingress 8 0 192.0.2.4 "ACL mirror to gretap"

	full_test_span_gre_dir_acl gt6 ingress 8 0 192.0.2.4 "ACL mirror to ip6gretap"



	full_test_span_gre_dir_acl gt4 egress 0 8 192.0.2.3 "ACL mirror to gretap"

	full_test_span_gre_dir_acl gt6 egress 0 8 192.0.2.3 "ACL mirror to ip6gretap"



	slow_path_trap_uninstall $swp1 egress

	slow_path_trap_uninstall $swp1 ingress

}



trap cleanup EXIT



setup_prepare

setup_wait



tcflags="skip_hw"

test_all



if ! tc_offload_check; then

	echo "WARN: Could not test offloaded functionality"

else

	tcflags="skip_sw"

	test_all

fi



exit $EXIT_STATUS

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