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Commit 7d4cbae0 authored by Petr Machata's avatar Petr Machata Committed by David S. Miller
Browse files

selftests: forwarding: Add libs for gretap mirror testing 



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: default avatarPetr Machata <petrm@mellanox.com>
Reviewed-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6a26ef9b

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_lib.sh

0 → 100644
+85 −0
Original line number Diff line number Diff line 
# 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

}

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

0 → 100644
+129 −0
Original line number Diff line number Diff line 
# 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

}

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

0 → 100644
+40 −0
Original line number Diff line number Diff line 
# 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."

}