In preparation for the upcoming split of multicast router state into
their IPv4 and IPv6 variants move the protocol specific router list
and timer access to ip4 wrapper functions.
Signed-off-by: Linus Lüssing <linus.luessing@xxxxxxxxx>
---
net/bridge/br_multicast.c | 121 +++++++++++++++++++++++++++-----------
1 file changed, 87 insertions(+), 34 deletions(-)
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 7815991..dc95464 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -51,8 +51,8 @@ static const struct rhashtable_params br_sg_port_rht_params = {
static void br_multicast_start_querier(struct net_bridge *br,
struct bridge_mcast_own_query *query);
-static void br_multicast_add_router(struct net_bridge *br,
- struct net_bridge_port *port);
+static void br_ip4_multicast_add_router(struct net_bridge *br,
+ struct net_bridge_port *port);
static void br_ip4_multicast_leave_group(struct net_bridge *br,
struct net_bridge_port *port,
__be32 group,
@@ -1687,9 +1687,8 @@ static void __br_multicast_enable_port(struct net_bridge_port *port)
#if IS_ENABLED(CONFIG_IPV6)
br_multicast_enable(&port->ip6_own_query);
#endif
- if (port->multicast_router == MDB_RTR_TYPE_PERM &&
- hlist_unhashed(&port->ip4_rlist))
- br_multicast_add_router(br, port);
+ if (port->multicast_router == MDB_RTR_TYPE_PERM)
+ br_ip4_multicast_add_router(br, port);
}
void br_multicast_enable_port(struct net_bridge_port *port)
@@ -2653,45 +2652,86 @@ static void br_port_mc_router_state_change(struct net_bridge_port *p,
switchdev_port_attr_set(p->dev, &attr, NULL);
}
-/*
- * Add port to router_list
- * list is maintained ordered by pointer value
- * and locked by br->multicast_lock and RCU
- */
-static void br_multicast_add_router(struct net_bridge *br,
- struct net_bridge_port *port)
+static struct net_bridge_port *
+br_multicast_rport_from_node(struct net_bridge *br,
+ struct hlist_head *mc_router_list,
+ struct hlist_node *rlist)
+{
+ return hlist_entry(rlist, struct net_bridge_port, ip4_rlist);
+}
+
+static struct hlist_node *
+br_multicast_get_rport_slot(struct net_bridge *br,
+ struct net_bridge_port *port,
+ struct hlist_head *mc_router_list)
+
{
- struct net_bridge_port *p;
struct hlist_node *slot = NULL;
+ struct net_bridge_port *p;
+ struct hlist_node *rlist;
- if (!hlist_unhashed(&port->ip4_rlist))
- return;
+ hlist_for_each(rlist, mc_router_list) {
+ p = br_multicast_rport_from_node(br, mc_router_list, rlist);
- hlist_for_each_entry(p, &br->ip4_mc_router_list, ip4_rlist) {
- if ((unsigned long) port >= (unsigned long) p)
+ if ((unsigned long)port >= (unsigned long)p)
break;
- slot = &p->ip4_rlist;
+
+ slot = rlist;
}
+ return slot;
+}
+
+/* Add port to router_list
+ * list is maintained ordered by pointer value
+ * and locked by br->multicast_lock and RCU
+ */
+static void br_multicast_add_router(struct net_bridge *br,
+ struct net_bridge_port *port,
+ struct hlist_node *rlist,
+ struct hlist_head *mc_router_list)
+{
+ struct hlist_node *slot;
+
+ if (!hlist_unhashed(rlist))
+ return;
+
+ slot = br_multicast_get_rport_slot(br, port, mc_router_list);
+
if (slot)
- hlist_add_behind_rcu(&port->ip4_rlist, slot);
+ hlist_add_behind_rcu(rlist, slot);
else
- hlist_add_head_rcu(&port->ip4_rlist, &br->ip4_mc_router_list);
+ hlist_add_head_rcu(rlist, mc_router_list);
+
br_rtr_notify(br->dev, port, RTM_NEWMDB);
br_port_mc_router_state_change(port, true);
}
+/* Add port to router_list
+ * list is maintained ordered by pointer value
+ * and locked by br->multicast_lock and RCU
+ */
+static void br_ip4_multicast_add_router(struct net_bridge *br,
+ struct net_bridge_port *port)
+{
+ br_multicast_add_router(br, port, &port->ip4_rlist,
+ &br->ip4_mc_router_list);
+}
+
static void br_multicast_mark_router(struct net_bridge *br,
- struct net_bridge_port *port)
+ struct net_bridge_port *port,
+ struct timer_list *timer,
+ struct hlist_node *rlist,
+ struct hlist_head *mc_router_list)
{
unsigned long now = jiffies;
if (!port) {
if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) {
- if (!timer_pending(&br->ip4_mc_router_timer))
+ if (!br_ip4_multicast_is_router(br) &&
+ !br_ip6_multicast_is_router(br))
br_mc_router_state_change(br, true);
- mod_timer(&br->ip4_mc_router_timer,
- now + br->multicast_querier_interval);
+ mod_timer(timer, now + br->multicast_querier_interval);
}
return;
}
@@ -2700,10 +2740,23 @@ static void br_multicast_mark_router(struct net_bridge *br,
port->multicast_router == MDB_RTR_TYPE_PERM)
return;
- br_multicast_add_router(br, port);
+ br_multicast_add_router(br, port, rlist, mc_router_list);
+ mod_timer(timer, now + br->multicast_querier_interval);
+}
- mod_timer(&port->ip4_mc_router_timer,
- now + br->multicast_querier_interval);
+static void br_ip4_multicast_mark_router(struct net_bridge *br,
+ struct net_bridge_port *port)
+{
+ struct timer_list *timer = &br->ip4_mc_router_timer;
+ struct hlist_node *rlist = NULL;
+
+ if (port) {
+ timer = &port->ip4_mc_router_timer;
+ rlist = &port->ip4_rlist;
+ }
+
+ br_multicast_mark_router(br, port, timer, rlist,
+ &br->ip4_mc_router_list);
}
static void
@@ -2717,7 +2770,7 @@ br_ip4_multicast_query_received(struct net_bridge *br,
return;
br_multicast_update_query_timer(br, query, max_delay);
- br_multicast_mark_router(br, port);
+ br_ip4_multicast_mark_router(br, port);
}
#if IS_ENABLED(CONFIG_IPV6)
@@ -2732,7 +2785,7 @@ br_ip6_multicast_query_received(struct net_bridge *br,
return;
br_multicast_update_query_timer(br, query, max_delay);
- br_multicast_mark_router(br, port);
+ br_ip4_multicast_mark_router(br, port);
}
#endif
@@ -3102,7 +3155,7 @@ static void br_multicast_pim(struct net_bridge *br,
pim_hdr_type(pimhdr) != PIM_TYPE_HELLO)
return;
- br_multicast_mark_router(br, port);
+ br_ip4_multicast_mark_router(br, port);
}
static int br_ip4_multicast_mrd_rcv(struct net_bridge *br,
@@ -3113,7 +3166,7 @@ static int br_ip4_multicast_mrd_rcv(struct net_bridge *br,
igmp_hdr(skb)->type != IGMP_MRDISC_ADV)
return -ENOMSG;
- br_multicast_mark_router(br, port);
+ br_ip4_multicast_mark_router(br, port);
return 0;
}
@@ -3181,7 +3234,7 @@ static void br_ip6_multicast_mrd_rcv(struct net_bridge *br,
if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV)
return;
- br_multicast_mark_router(br, port);
+ br_ip4_multicast_mark_router(br, port);
}
static int br_multicast_ipv6_rcv(struct net_bridge *br,
@@ -3526,11 +3579,11 @@ int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
case MDB_RTR_TYPE_PERM:
p->multicast_router = MDB_RTR_TYPE_PERM;
del_timer(&p->ip4_mc_router_timer);
- br_multicast_add_router(br, p);
+ br_ip4_multicast_add_router(br, p);
break;
case MDB_RTR_TYPE_TEMP:
p->multicast_router = MDB_RTR_TYPE_TEMP;
- br_multicast_mark_router(br, p);
+ br_ip4_multicast_mark_router(br, p);
break;
default:
goto unlock;
--
2.31.0
