5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yong Wang yongwang@nvidia.com
[ Upstream commit 4b30ae9adb047dd0a7982975ec3933c529537026 ]
When a bridge port STP state is changed from BLOCKING/DISABLED to FORWARDING, the port's igmp query timer will NOT re-arm itself if the bridge has been configured as per-VLAN multicast snooping.
Solve this by choosing the correct multicast context(s) to enable/disable port multicast based on whether per-VLAN multicast snooping is enabled or not, i.e. using per-{port, VLAN} context in case of per-VLAN multicast snooping by re-implementing br_multicast_enable_port() and br_multicast_disable_port() functions.
Before the patch, the IGMP query does not happen in the last step of the following test sequence, i.e. no growth for tx counter: # ip link add name br1 up type bridge vlan_filtering 1 mcast_snooping 1 mcast_vlan_snooping 1 mcast_querier 1 mcast_stats_enabled 1 # bridge vlan global set vid 1 dev br1 mcast_snooping 1 mcast_querier 1 mcast_query_interval 100 mcast_startup_query_count 0 # ip link add name swp1 up master br1 type dummy # bridge link set dev swp1 state 0 # ip -j -p stats show dev swp1 group xstats_slave subgroup bridge suite mcast | jq '.[]["multicast"]["igmp_queries"]["tx_v2"]' 1 # sleep 1 # ip -j -p stats show dev swp1 group xstats_slave subgroup bridge suite mcast | jq '.[]["multicast"]["igmp_queries"]["tx_v2"]' 1 # bridge link set dev swp1 state 3 # sleep 2 # ip -j -p stats show dev swp1 group xstats_slave subgroup bridge suite mcast | jq '.[]["multicast"]["igmp_queries"]["tx_v2"]' 1
After the patch, the IGMP query happens in the last step of the test: # ip link add name br1 up type bridge vlan_filtering 1 mcast_snooping 1 mcast_vlan_snooping 1 mcast_querier 1 mcast_stats_enabled 1 # bridge vlan global set vid 1 dev br1 mcast_snooping 1 mcast_querier 1 mcast_query_interval 100 mcast_startup_query_count 0 # ip link add name swp1 up master br1 type dummy # bridge link set dev swp1 state 0 # ip -j -p stats show dev swp1 group xstats_slave subgroup bridge suite mcast | jq '.[]["multicast"]["igmp_queries"]["tx_v2"]' 1 # sleep 1 # ip -j -p stats show dev swp1 group xstats_slave subgroup bridge suite mcast | jq '.[]["multicast"]["igmp_queries"]["tx_v2"]' 1 # bridge link set dev swp1 state 3 # sleep 2 # ip -j -p stats show dev swp1 group xstats_slave subgroup bridge suite mcast | jq '.[]["multicast"]["igmp_queries"]["tx_v2"]' 3
Signed-off-by: Yong Wang yongwang@nvidia.com Reviewed-by: Andy Roulin aroulin@nvidia.com Reviewed-by: Ido Schimmel idosch@nvidia.com Signed-off-by: Petr Machata petrm@nvidia.com Acked-by: Nikolay Aleksandrov razor@blackwall.org Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- net/bridge/br_multicast.c | 77 +++++++++++++++++++++++++++++++++++---- 1 file changed, 69 insertions(+), 8 deletions(-)
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index 3cd2b648408d6..085c9e706bc47 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -1931,12 +1931,17 @@ static void __br_multicast_enable_port_ctx(struct net_bridge_mcast_port *pmctx) } }
-void br_multicast_enable_port(struct net_bridge_port *port) +static void br_multicast_enable_port_ctx(struct net_bridge_mcast_port *pmctx) { - struct net_bridge *br = port->br; + struct net_bridge *br = pmctx->port->br;
spin_lock_bh(&br->multicast_lock); - __br_multicast_enable_port_ctx(&port->multicast_ctx); + if (br_multicast_port_ctx_is_vlan(pmctx) && + !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED)) { + spin_unlock_bh(&br->multicast_lock); + return; + } + __br_multicast_enable_port_ctx(pmctx); spin_unlock_bh(&br->multicast_lock); }
@@ -1963,11 +1968,67 @@ static void __br_multicast_disable_port_ctx(struct net_bridge_mcast_port *pmctx) br_multicast_rport_del_notify(pmctx, del); }
+static void br_multicast_disable_port_ctx(struct net_bridge_mcast_port *pmctx) +{ + struct net_bridge *br = pmctx->port->br; + + spin_lock_bh(&br->multicast_lock); + if (br_multicast_port_ctx_is_vlan(pmctx) && + !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED)) { + spin_unlock_bh(&br->multicast_lock); + return; + } + + __br_multicast_disable_port_ctx(pmctx); + spin_unlock_bh(&br->multicast_lock); +} + +static void br_multicast_toggle_port(struct net_bridge_port *port, bool on) +{ +#if IS_ENABLED(CONFIG_BRIDGE_VLAN_FILTERING) + if (br_opt_get(port->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) { + struct net_bridge_vlan_group *vg; + struct net_bridge_vlan *vlan; + + rcu_read_lock(); + vg = nbp_vlan_group_rcu(port); + if (!vg) { + rcu_read_unlock(); + return; + } + + /* iterate each vlan, toggle vlan multicast context */ + list_for_each_entry_rcu(vlan, &vg->vlan_list, vlist) { + struct net_bridge_mcast_port *pmctx = + &vlan->port_mcast_ctx; + u8 state = br_vlan_get_state(vlan); + /* enable vlan multicast context when state is + * LEARNING or FORWARDING + */ + if (on && br_vlan_state_allowed(state, true)) + br_multicast_enable_port_ctx(pmctx); + else + br_multicast_disable_port_ctx(pmctx); + } + rcu_read_unlock(); + return; + } +#endif + /* toggle port multicast context when vlan snooping is disabled */ + if (on) + br_multicast_enable_port_ctx(&port->multicast_ctx); + else + br_multicast_disable_port_ctx(&port->multicast_ctx); +} + +void br_multicast_enable_port(struct net_bridge_port *port) +{ + br_multicast_toggle_port(port, true); +} + void br_multicast_disable_port(struct net_bridge_port *port) { - spin_lock_bh(&port->br->multicast_lock); - __br_multicast_disable_port_ctx(&port->multicast_ctx); - spin_unlock_bh(&port->br->multicast_lock); + br_multicast_toggle_port(port, false); }
static int __grp_src_delete_marked(struct net_bridge_port_group *pg) @@ -4130,9 +4191,9 @@ int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, __br_multicast_open(&br->multicast_ctx); list_for_each_entry(p, &br->port_list, list) { if (on) - br_multicast_disable_port(p); + br_multicast_disable_port_ctx(&p->multicast_ctx); else - br_multicast_enable_port(p); + br_multicast_enable_port_ctx(&p->multicast_ctx); }
list_for_each_entry(vlan, &vg->vlan_list, vlist)