selftests: net: bridge: add test for igmpv3 exc -> allow report

The test checks for the following case:
   state          report        result                  action
  EXCLUDE (X,Y)  ALLOW (A)     EXCLUDE (X+A,Y-A)       (A)=GMI
Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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

@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: GPL-2.0
 
 ALL_TESTS="v2reportleave_test v3include_test v3inc_allow_test v3inc_is_include_test \
-	   v3inc_is_exclude_test v3inc_to_exclude_test"
+	   v3inc_is_exclude_test v3inc_to_exclude_test v3exc_allow_test"
 NUM_NETIFS=4
 CHECK_TC="yes"
 TEST_GROUP="239.10.10.10"
@@ -17,6 +17,8 @@ MZPKT_IS_INC="22:00:9d:de:00:00:00:01:01:00:00:03:ef:0a:0a:0a:c0:00:02:01:c0:00:
 MZPKT_IS_INC2="22:00:9d:c3:00:00:00:01:01:00:00:03:ef:0a:0a:0a:c0:00:02:0a:c0:00:02:0b:c0:00:02:0c"
 # IGMPv3 allow report: grp 239.10.10.10 allow 192.0.2.10,192.0.2.11,192.0.2.12
 MZPKT_ALLOW="22:00:99:c3:00:00:00:01:05:00:00:03:ef:0a:0a:0a:c0:00:02:0a:c0:00:02:0b:c0:00:02:0c"
+# IGMPv3 allow report: grp 239.10.10.10 allow 192.0.2.20,192.0.2.30
+MZPKT_ALLOW2="22:00:5b:b4:00:00:00:01:05:00:00:02:ef:0a:0a:0a:c0:00:02:14:c0:00:02:1e"
 # IGMPv3 is_ex report: grp 239.10.10.10 is_exclude 192.0.2.1,192.0.2.2,192.0.2.20,192.0.2.21
 MZPKT_IS_EXC="22:00:da:b6:00:00:00:01:02:00:00:04:ef:0a:0a:0a:c0:00:02:01:c0:00:02:02:c0:00:02:14:c0:00:02:15"
 # IGMPv3 to_ex report: grp 239.10.10.10 to_exclude 192.0.2.1,192.0.2.20,192.0.2.30
@@ -250,6 +252,38 @@ v3include_prepare()
 	check_sg_entries "is_include" "${X[@]}"
 }
 
+v3exclude_prepare()
+{
+	local host1_if=$1
+	local mac=$2
+	local group=$3
+	local pkt=$4
+	local X=("192.0.2.1" "192.0.2.2")
+	local Y=("192.0.2.20" "192.0.2.21")
+
+	v3include_prepare $host1_if $mac $group
+
+	$MZ $host1_if -c 1 -b $mac -B $group -t ip "proto=2,p=$MZPKT_IS_EXC" -q
+	sleep 1
+	bridge -j -d -s mdb show dev br0 \
+		| jq -e ".[].mdb[] | \
+			 select(.grp == \"$TEST_GROUP\" and \
+				.source_list != null and .filter_mode == \"exclude\")" &>/dev/null
+	check_err $? "Wrong *,G entry filter mode"
+
+	check_sg_entries "is_exclude" "${X[@]}" "${Y[@]}"
+
+	check_sg_state 0 "${X[@]}"
+	check_sg_state 1 "${Y[@]}"
+
+	bridge -j -d -s mdb show dev br0 \
+		| jq -e ".[].mdb[] | \
+			 select(.grp == \"$TEST_GROUP\" and \
+				.source_list != null and
+				.source_list[].address == \"192.0.2.3\")" &>/dev/null
+	check_fail $? "Wrong *,G entry source list, 192.0.2.3 entry still exists"
+}
+
 v3cleanup()
 {
 	local port=$1
@@ -321,30 +355,8 @@ v3inc_is_include_test()
 v3inc_is_exclude_test()
 {
 	RET=0
-	local X=("192.0.2.1" "192.0.2.2")
-	local Y=("192.0.2.20" "192.0.2.21")
-
-	v3include_prepare $h1 $ALL_MAC $ALL_GROUP
-
-	$MZ $h1 -c 1 -b $ALL_MAC -B $ALL_GROUP -t ip "proto=2,p=$MZPKT_IS_EXC" -q
-	sleep 1
-	bridge -j -d -s mdb show dev br0 \
-		| jq -e ".[].mdb[] | \
-			 select(.grp == \"$TEST_GROUP\" and \
-				.source_list != null and .filter_mode == \"exclude\")" &>/dev/null
-	check_err $? "Wrong *,G entry filter mode"
-
-	check_sg_entries "is_exclude" "${X[@]}" "${Y[@]}"
 
-	check_sg_state 0 "${X[@]}"
-	check_sg_state 1 "${Y[@]}"
-
-	bridge -j -d -s mdb show dev br0 \
-		| jq -e ".[].mdb[] | \
-			 select(.grp == \"$TEST_GROUP\" and \
-				.source_list != null and
-				.source_list[].address == \"192.0.2.3\")" &>/dev/null
-	check_fail $? "Wrong *,G entry source list, 192.0.2.3 entry still exists"
+	v3exclude_prepare $h1 $ALL_MAC $ALL_GROUP
 
 	check_sg_fwding 1 "${X[@]}" 192.0.2.100
 	check_sg_fwding 0 "${Y[@]}"
@@ -401,6 +413,29 @@ v3inc_to_exclude_test()
 	v3cleanup $swp1 $TEST_GROUP
 }
 
+v3exc_allow_test()
+{
+	RET=0
+	local X=("192.0.2.1" "192.0.2.2" "192.0.2.20" "192.0.2.30")
+	local Y=("192.0.2.21")
+
+	v3exclude_prepare $h1 $ALL_MAC $ALL_GROUP
+
+	$MZ $h1 -c 1 -b $ALL_MAC -B $ALL_GROUP -t ip "proto=2,p=$MZPKT_ALLOW2" -q
+	sleep 1
+	check_sg_entries "allow" "${X[@]}" "${Y[@]}"
+
+	check_sg_state 0 "${X[@]}"
+	check_sg_state 1 "${Y[@]}"
+
+	check_sg_fwding 1 "${X[@]}" 192.0.2.100
+	check_sg_fwding 0 "${Y[@]}"
+
+	log_test "IGMPv3 report $TEST_GROUP exclude -> allow"
+
+	v3cleanup $swp1 $TEST_GROUP
+}
+
 trap cleanup EXIT
 
 setup_prepare