selftests: forwarding: Add a test for pedit munge SIP and DIP

Add a test that checks that pedit adjusts source and destination
addresses of IPv4 and IPv6 packets.

Output example:

$ ./pedit_ip.sh
TEST: ping                                                          [ OK ]
TEST: ping6                                                         [ OK ]
TEST: dev swp2 ingress pedit ip src set 198.51.100.1                [ OK ]
TEST: dev swp3 egress pedit ip src set 198.51.100.1                 [ OK ]
TEST: dev swp2 ingress pedit ip dst set 198.51.100.1                [ OK ]
TEST: dev swp3 egress pedit ip dst set 198.51.100.1                 [ OK ]
TEST: dev swp2 ingress pedit ip6 src set 2001:db8:2::1              [ OK ]
TEST: dev swp3 egress pedit ip6 src set 2001:db8:2::1               [ OK ]
TEST: dev swp2 ingress pedit ip6 dst set 2001:db8:2::1              [ OK ]
TEST: dev swp3 egress pedit ip6 dst set 2001:db8:2::1               [ OK ]

Signed-off-by: Danielle Ratson <danieller@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/net/forwarding/pedit_ip.sh b/tools/testing/selftests/net/forwarding/pedit_ip.sh
new file mode 100755 (executable)
index 0000000..d14efb2
--- /dev/null
+++ b/tools/testing/selftests/net/forwarding/pedit_ip.sh
@@ -0,0 +1,201 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+# This test sends traffic from H1 to H2. Either on ingress of $swp1, or on
+# egress of $swp2, the traffic is acted upon by a pedit action. An ingress
+# filter installed on $h2 verifies that the packet looks like expected.
+#
+# +----------------------+                             +----------------------+
+# | H1                   |                             |                   H2 |
+# |    + $h1             |                             |            $h2 +     |
+# |    | 192.0.2.1/28    |                             |   192.0.2.2/28 |     |
+# +----|-----------------+                             +----------------|-----+
+#      |                                                                |
+# +----|----------------------------------------------------------------|-----+
+# | SW |                                                                |     |
+# |  +-|----------------------------------------------------------------|-+   |
+# |  | + $swp1                       BR                           $swp2 + |   |
+# |  +--------------------------------------------------------------------+   |
+# +---------------------------------------------------------------------------+
+
+ALL_TESTS="
+       ping_ipv4
+       ping_ipv6
+       test_ip4_src
+       test_ip4_dst
+       test_ip6_src
+       test_ip6_dst
+"
+
+NUM_NETIFS=4
+source lib.sh
+source tc_common.sh
+
+h1_create()
+{
+       simple_if_init $h1 192.0.2.1/28 2001:db8:1::1/64
+}
+
+h1_destroy()
+{
+       simple_if_fini $h1 192.0.2.1/28 2001:db8:1::1/64
+}
+
+h2_create()
+{
+       simple_if_init $h2 192.0.2.2/28 2001:db8:1::2/64
+       tc qdisc add dev $h2 clsact
+}
+
+h2_destroy()
+{
+       tc qdisc del dev $h2 clsact
+       simple_if_fini $h2 192.0.2.2/28 2001:db8:1::2/64
+}
+
+switch_create()
+{
+       ip link add name br1 up type bridge vlan_filtering 1
+       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
+       tc qdisc add dev $swp2 clsact
+}
+
+switch_destroy()
+{
+       tc qdisc del dev $swp2 clsact
+       tc qdisc del dev $swp1 clsact
+
+       ip link set dev $swp2 down
+       ip link set dev $swp2 nomaster
+       ip link set dev $swp1 down
+       ip link set dev $swp1 nomaster
+       ip link del dev br1
+}
+
+setup_prepare()
+{
+       h1=${NETIFS[p1]}
+       swp1=${NETIFS[p2]}
+
+       swp2=${NETIFS[p3]}
+       h2=${NETIFS[p4]}
+
+       h2mac=$(mac_get $h2)
+
+       vrf_prepare
+       h1_create
+       h2_create
+       switch_create
+}
+
+cleanup()
+{
+       pre_cleanup
+
+       switch_destroy
+       h2_destroy
+       h1_destroy
+       vrf_cleanup
+}
+
+ping_ipv4()
+{
+       ping_test $h1 192.0.2.2
+}
+
+ping_ipv6()
+{
+       ping6_test $h1 2001:db8:1::2
+}
+
+do_test_pedit_ip()
+{
+       local pedit_locus=$1; shift
+       local pedit_action=$1; shift
+       local match_prot=$1; shift
+       local match_flower=$1; shift
+       local mz_flags=$1; shift
+
+       tc filter add $pedit_locus handle 101 pref 1 \
+          flower action pedit ex munge $pedit_action
+       tc filter add dev $h2 ingress handle 101 pref 1 prot $match_prot \
+          flower skip_hw $match_flower action pass
+
+       RET=0
+
+       $MZ $mz_flags $h1 -c 10 -d 20msec -p 100 -a own -b $h2mac -q -t ip
+
+       local pkts
+       pkts=$(busywait "$TC_HIT_TIMEOUT" until_counter_is ">= 10" \
+                       tc_rule_handle_stats_get "dev $h2 ingress" 101)
+       check_err $? "Expected to get 10 packets, but got $pkts."
+
+       pkts=$(tc_rule_handle_stats_get "$pedit_locus" 101)
+       ((pkts >= 10))
+       check_err $? "Expected to get 10 packets on pedit rule, but got $pkts."
+
+       log_test "$pedit_locus pedit $pedit_action"
+
+       tc filter del dev $h2 ingress pref 1
+       tc filter del $pedit_locus pref 1
+}
+
+do_test_pedit_ip6()
+{
+       local locus=$1; shift
+       local pedit_addr=$1; shift
+       local flower_addr=$1; shift
+
+       do_test_pedit_ip "$locus" "$pedit_addr set 2001:db8:2::1" ipv6  \
+                        "$flower_addr 2001:db8:2::1"                   \
+                        "-6 -A 2001:db8:1::1 -B 2001:db8:1::2"
+}
+
+do_test_pedit_ip4()
+{
+       local locus=$1; shift
+       local pedit_addr=$1; shift
+       local flower_addr=$1; shift
+
+       do_test_pedit_ip "$locus" "$pedit_addr set 198.51.100.1" ip     \
+                        "$flower_addr 198.51.100.1"                    \
+                        "-A 192.0.2.1 -B 192.0.2.2"
+}
+
+test_ip4_src()
+{
+       do_test_pedit_ip4 "dev $swp1 ingress" "ip src" src_ip
+       do_test_pedit_ip4 "dev $swp2 egress"  "ip src" src_ip
+}
+
+test_ip4_dst()
+{
+       do_test_pedit_ip4 "dev $swp1 ingress" "ip dst" dst_ip
+       do_test_pedit_ip4 "dev $swp2 egress"  "ip dst" dst_ip
+}
+
+test_ip6_src()
+{
+       do_test_pedit_ip6 "dev $swp1 ingress" "ip6 src" src_ip
+       do_test_pedit_ip6 "dev $swp2 egress"  "ip6 src" src_ip
+}
+
+test_ip6_dst()
+{
+       do_test_pedit_ip6 "dev $swp1 ingress" "ip6 dst" dst_ip
+       do_test_pedit_ip6 "dev $swp2 egress"  "ip6 dst" dst_ip
+}
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+
+tests_run
+
+exit $EXIT_STATUS