[PATCH net-next v5 5/5] selftests: net: bridge: add MRC and QQIC field encoding tests
From: Ujjal Roy
Date: Fri May 01 2026 - 13:34:42 EST
Enhance vlmc_query_intvl_test and vlmc_query_response_intvl_test in
bridge_vlan_mcast.sh to validate IGMPv3/MLDv2 protocol compliance for
MRC and QQIC field encoding across both linear and exponential ranges.
TEST: Vlan multicast snooping enable [ OK ]
TEST: Vlan mcast_query_interval global option default value [ OK ]
TEST: Number of tagged IGMPv2 general query [ OK ]
TEST: IGMPv3 QQIC linear value 60(s) [ OK ]
TEST: MLDv2 QQIC linear value 60(s) [ OK ]
TEST: IGMPv3 QQIC non linear value 160(s) [ OK ]
TEST: MLDv2 QQIC non linear value 160(s) [ OK ]
TEST: Vlan mcast_query_response_interval global option default value [ OK ]
TEST: IGMPv3 MRC linear value of 60(x0.1s) [ OK ]
TEST: MLDv2 MRC linear value of 24000(ms) [ OK ]
TEST: IGMPv3 MRC non linear value of 240(x0.1s) [ OK ]
TEST: MLDv2 MRC non linear value of 48000(ms) [ OK ]
Reviewed-by: Ido Schimmel <idosch@xxxxxxxxxx>
Signed-off-by: Ujjal Roy <royujjal@xxxxxxxxx>
---
.../net/forwarding/bridge_vlan_mcast.sh | 140 +++++++++++++++++-
1 file changed, 132 insertions(+), 8 deletions(-)
diff --git a/tools/testing/selftests/net/forwarding/bridge_vlan_mcast.sh b/tools/testing/selftests/net/forwarding/bridge_vlan_mcast.sh
index e8031f68200a..07a377652a59 100755
--- a/tools/testing/selftests/net/forwarding/bridge_vlan_mcast.sh
+++ b/tools/testing/selftests/net/forwarding/bridge_vlan_mcast.sh
@@ -162,14 +162,27 @@ vlmc_query_cnt_setup()
{
local type=$1
local dev=$2
+ local match=($3)
if [[ $type == "igmp" ]]; then
- tc filter add dev $dev egress pref 10 prot 802.1Q \
+ # This matches: IP Protocol 2 (IGMP)
+ tc filter add dev "$dev" egress pref 10 prot 802.1Q \
flower vlan_id 10 vlan_ethtype ipv4 dst_ip 224.0.0.1 ip_proto 2 \
+ action goto chain 1
+ # AND Type 0x11 (Query) at offset 0 of IGMP header
+ # 20 bytes IPv4 header + 4 bytes Router Alert option + IGMP[offset 0]
+ tc filter add dev "$dev" egress pref 20 chain 1 prot 802.1Q u32 \
+ match u8 0x11 0xff at 24 "${match[@]}" \
action pass
else
- tc filter add dev $dev egress pref 10 prot 802.1Q \
+ # This matches: ICMPv6
+ tc filter add dev "$dev" egress pref 10 prot 802.1Q \
flower vlan_id 10 vlan_ethtype ipv6 dst_ip ff02::1 ip_proto icmpv6 \
+ action goto chain 1
+ # AND Type 0x82 (Query) at offset 0 of MLD header
+ # 40 bytes IPv6 header + 8 bytes Hop-by-hop option + MLD[offset 0]
+ tc filter add dev "$dev" egress pref 20 chain 1 prot 802.1Q u32 \
+ match u8 0x82 0xff at 48 "${match[@]}" \
action pass
fi
@@ -181,7 +194,39 @@ vlmc_query_cnt_cleanup()
local dev=$1
ip link set dev br0 type bridge mcast_stats_enabled 0
- tc filter del dev $dev egress pref 10
+ tc filter del dev "$dev" egress pref 20 chain 1
+ tc filter del dev "$dev" egress pref 10
+}
+
+vlmc_query_get_intvl_match()
+{
+ local type=$1
+ local version=$2
+ local test=$3
+ local enc_val=$4
+
+ if [ "$test" = "qqic" ]; then
+ # QQIC is 8-bit floating point encoding for IGMPv3 and MLDv2
+ if [ "${type}v${version}" = "igmpv3" ]; then
+ # QQIC is at offset 9 of IGMP header
+ # 20 bytes IPv4 header + 4 bytes Router Alert option + IGMP[offset 9]
+ echo "match u8 $enc_val 0xff at 33"
+ elif [ "${type}v${version}" = "mldv2" ]; then
+ # QQIC is at offset 25 of MLD header
+ # 40 bytes IPv6 header + 8 bytes Hop-by-hop option + MLD[offset 25]
+ echo "match u8 $enc_val 0xff at 73"
+ fi
+ elif [ "$test" = "mrc" ]; then
+ if [ "${type}v${version}" = "igmpv3" ]; then
+ # MRC is 8-bit floating point encoding at offset 1 of IGMP header
+ # 20 bytes IPv4 header + 4 bytes Router Alert option + IGMP[offset 1]
+ echo "match u8 $enc_val 0xff at 25"
+ elif [ "${type}v${version}" = "mldv2" ]; then
+ # MRC is 16-bit floating point encoding at offset 4 of MLD header
+ # 40 bytes IPv6 header + 8 bytes Hop-by-hop option + MLD[offset 4]
+ echo "match u16 $enc_val 0xffff at 52"
+ fi
+ fi
}
vlmc_check_query()
@@ -191,9 +236,13 @@ vlmc_check_query()
local dev=$3
local expect=$4
local time=$5
+ local test=$6
+ local enc_val=$7
+ local intvl_match=""
local ret=0
- vlmc_query_cnt_setup $type $dev
+ intvl_match="$(vlmc_query_get_intvl_match "$type" "$version" "$test" "$enc_val")"
+ vlmc_query_cnt_setup "$type" "$dev" "$intvl_match"
local pre_tx_xstats=$(vlmc_query_cnt_xstats $type $version $dev)
bridge vlan global set vid 10 dev br0 mcast_snooping 1 mcast_querier 1
@@ -201,7 +250,7 @@ vlmc_check_query()
if [[ $ret -eq 0 ]]; then
sleep $time
- local tcstats=$(tc_rule_stats_get $dev 10 egress)
+ local tcstats=$(tc_rule_stats_get "$dev" 20 egress)
local post_tx_xstats=$(vlmc_query_cnt_xstats $type $version $dev)
if [[ $tcstats != $expect || \
@@ -448,8 +497,46 @@ vlmc_query_intvl_test()
# 1 is sent immediately, then 2 more in the next 5 seconds
vlmc_check_query igmp 2 $swp1 3 5
check_err $? "Wrong number of tagged IGMPv2 general queries sent"
- log_test "Vlan 10 mcast_query_interval option changed to 200"
+ log_test "Number of tagged IGMPv2 general query"
+
+ RET=0
+ bridge vlan global set vid 10 dev br0 mcast_snooping 1 mcast_igmp_version 3
+ check_err $? "Could not set mcast_igmp_version in vlan 10"
+ bridge vlan global set vid 10 dev br0 mcast_snooping 1 mcast_mld_version 2
+ check_err $? "Could not set mcast_mld_version in vlan 10"
+ bridge vlan global set vid 10 dev br0 mcast_snooping 1 mcast_query_interval 6000
+ check_err $? "Could not set mcast_query_interval in vlan 10"
+ # 1 is sent immediately, IGMPv3 QQIC should match with linear value 60 (0x3c)
+ # which is 8-bit encoded value of 60 [units of seconds]
+ vlmc_check_query igmp 3 $swp1 1 1 qqic 0x3c
+ check_err $? "Wrong QQIC in generated IGMPv3 general queries"
+ log_test "IGMPv3 QQIC linear value 60(s)"
+
+ RET=0
+ # 1 is sent immediately, MLDv2 QQIC should match with linear value 60 (0x3c)
+ # which is 8-bit encoded value of 60 [units of seconds]
+ vlmc_check_query mld 2 $swp1 1 1 qqic 0x3c
+ check_err $? "Wrong QQIC in generated MLDv2 general queries"
+ log_test "MLDv2 QQIC linear value 60(s)"
+
+ RET=0
+ bridge vlan global set vid 10 dev br0 mcast_snooping 1 mcast_query_interval 16000
+ check_err $? "Could not set mcast_query_interval in vlan 10"
+ # 1 is sent immediately, IGMPv3 QQIC should match with non linear value 132 (0x84)
+ # which is 8-bit encoded value of 160 [units of seconds]
+ vlmc_check_query igmp 3 $swp1 1 1 qqic 0x84
+ check_err $? "Wrong QQIC in generated IGMPv3 general queries"
+ log_test "IGMPv3 QQIC non linear value 160(s)"
+ RET=0
+ # 1 is sent immediately, MLDv2 QQIC should match with non linear value 132 (0x84)
+ # which is 8-bit encoded value of 160 [units of seconds]
+ vlmc_check_query mld 2 $swp1 1 1 qqic 0x84
+ check_err $? "Wrong QQIC in generated MLDv2 general queries"
+ log_test "MLDv2 QQIC non linear value 160(s)"
+
+ bridge vlan global set vid 10 dev br0 mcast_snooping 1 mcast_igmp_version 2
+ bridge vlan global set vid 10 dev br0 mcast_snooping 1 mcast_mld_version 1
bridge vlan global set vid 10 dev br0 mcast_snooping 1 mcast_startup_query_count 2
bridge vlan global set vid 10 dev br0 mcast_snooping 1 mcast_query_interval 12500
}
@@ -469,10 +556,47 @@ vlmc_query_response_intvl_test()
log_test "Vlan mcast_query_response_interval global option default value"
RET=0
- bridge vlan global set vid 10 dev br0 mcast_snooping 1 mcast_query_response_interval 200
+ bridge vlan global set vid 10 dev br0 mcast_snooping 1 mcast_startup_query_count 0
+ bridge vlan global set vid 10 dev br0 mcast_snooping 1 mcast_igmp_version 3
+ check_err $? "Could not set mcast_igmp_version in vlan 10"
+ bridge vlan global set vid 10 dev br0 mcast_snooping 1 mcast_mld_version 2
+ check_err $? "Could not set mcast_mld_version in vlan 10"
+ bridge vlan global set vid 10 dev br0 mcast_snooping 1 mcast_query_response_interval 600
+ check_err $? "Could not set mcast_query_response_interval in vlan 10"
+ # 1 is sent immediately, IGMPv3 MRC should match with linear value 60 (0x3c)
+ # which is 8-bit encoded value of 60 [units of 0.1s = 6 seconds]
+ vlmc_check_query igmp 3 $swp1 1 1 mrc 0x3c
+ check_err $? "Wrong MRC in generated IGMPv3 general queries"
+ log_test "IGMPv3 MRC linear value of 60(x0.1s)"
+
+ RET=0
+ bridge vlan global set vid 10 dev br0 mcast_snooping 1 mcast_query_response_interval 2400
+ check_err $? "Could not set mcast_query_response_interval in vlan 10"
+ # 1 is sent immediately, MLDv2 MRC should match with linear value 0x5dc0 (24000)
+ # which is 16-bit encoded value of 24000 [units of ms / 24 seconds]
+ vlmc_check_query mld 2 $swp1 1 1 mrc 0x5dc0
+ check_err $? "Wrong MRC in generated MLDv2 general queries"
+ log_test "MLDv2 MRC linear value of 24000(ms)"
+
+ RET=0
+ # 1 is sent immediately, IGMPv3 MRC should match with non linear value 142 (0x8e)
+ # which is 8-bit encoded value of 240 [units of 0.1s = 24 seconds]
+ vlmc_check_query igmp 3 $swp1 1 1 mrc 0x8e
+ check_err $? "Wrong MRC in generated IGMPv3 general queries"
+ log_test "IGMPv3 MRC non linear value of 240(x0.1s)"
+
+ RET=0
+ bridge vlan global set vid 10 dev br0 mcast_snooping 1 mcast_query_response_interval 4800
check_err $? "Could not set mcast_query_response_interval in vlan 10"
- log_test "Vlan 10 mcast_query_response_interval option changed to 200"
+ # 1 is sent immediately, MLDv2 MRC should match with non linear value 0x8770 (34672)
+ # which is 16-bit encoded value of 48000 [units of ms / 48 seconds]
+ vlmc_check_query mld 2 $swp1 1 1 mrc 0x8770
+ check_err $? "Wrong MRC in generated MLDv2 general queries"
+ log_test "MLDv2 MRC non linear value of 48000(ms)"
+ bridge vlan global set vid 10 dev br0 mcast_snooping 1 mcast_igmp_version 2
+ bridge vlan global set vid 10 dev br0 mcast_snooping 1 mcast_mld_version 1
+ bridge vlan global set vid 10 dev br0 mcast_snooping 1 mcast_startup_query_count 2
bridge vlan global set vid 10 dev br0 mcast_snooping 1 mcast_query_response_interval 1000
}
--
2.43.0