From ce6f709775bdf9bc8dd852a8758e10a98f31f280 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Linus=20L=C3=BCssing?= <linus.luessing@c0d3.blue>
Date: Thu, 13 May 2021 15:20:43 +0200
Subject: [PATCH 01/11] net: bridge: mcast: rename multicast router lists and
timers
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
In preparation for the upcoming split of multicast router state into
their IPv4 and IPv6 variants, rename the affected variable to the IPv4
version first to avoid some renames in later commits.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/bridge/br_forward.c | 4 ++--
net/bridge/br_mdb.c | 6 ++---
net/bridge/br_multicast.c | 48 +++++++++++++++++++--------------------
net/bridge/br_private.h | 10 ++++----
4 files changed, 34 insertions(+), 34 deletions(-)
diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index 6e9b049ae521..eb9847ad40cf 100644
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -276,7 +276,7 @@ void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
bool allow_mode_include = true;
struct hlist_node *rp;
- rp = rcu_dereference(hlist_first_rcu(&br->router_list));
+ rp = rcu_dereference(hlist_first_rcu(&br->ip4_mc_router_list));
if (mdst) {
p = rcu_dereference(mdst->ports);
if (br_multicast_should_handle_mode(br, mdst->addr.proto) &&
@@ -290,7 +290,7 @@ void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
struct net_bridge_port *port, *lport, *rport;
lport = p ? p->key.port : NULL;
- rport = hlist_entry_safe(rp, struct net_bridge_port, rlist);
+ rport = hlist_entry_safe(rp, struct net_bridge_port, ip4_rlist);
if ((unsigned long)lport > (unsigned long)rport) {
port = lport;
diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
index 95fa4af0e8dd..d61def8c4647 100644
--- a/net/bridge/br_mdb.c
+++ b/net/bridge/br_mdb.c
@@ -23,14 +23,14 @@ static int br_rports_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
struct net_bridge_port *p;
struct nlattr *nest, *port_nest;
- if (!br->multicast_router || hlist_empty(&br->router_list))
+ if (!br->multicast_router || hlist_empty(&br->ip4_mc_router_list))
return 0;
nest = nla_nest_start_noflag(skb, MDBA_ROUTER);
if (nest == NULL)
return -EMSGSIZE;
- hlist_for_each_entry_rcu(p, &br->router_list, rlist) {
+ hlist_for_each_entry_rcu(p, &br->ip4_mc_router_list, ip4_rlist) {
if (!p)
continue;
port_nest = nla_nest_start_noflag(skb, MDBA_ROUTER_PORT);
@@ -38,7 +38,7 @@ static int br_rports_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
goto fail;
if (nla_put_nohdr(skb, sizeof(u32), &p->dev->ifindex) ||
nla_put_u32(skb, MDBA_ROUTER_PATTR_TIMER,
- br_timer_value(&p->multicast_router_timer)) ||
+ br_timer_value(&p->ip4_mc_router_timer)) ||
nla_put_u8(skb, MDBA_ROUTER_PATTR_TYPE,
p->multicast_router)) {
nla_nest_cancel(skb, port_nest);
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 226bb05c3b42..6fe93a30b575 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -1357,13 +1357,13 @@ static int br_ip6_multicast_add_group(struct net_bridge *br,
static void br_multicast_router_expired(struct timer_list *t)
{
struct net_bridge_port *port =
- from_timer(port, t, multicast_router_timer);
+ from_timer(port, t, ip4_mc_router_timer);
struct net_bridge *br = port->br;
spin_lock(&br->multicast_lock);
if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
port->multicast_router == MDB_RTR_TYPE_PERM ||
- timer_pending(&port->multicast_router_timer))
+ timer_pending(&port->ip4_mc_router_timer))
goto out;
__del_port_router(port);
@@ -1386,12 +1386,12 @@ static void br_mc_router_state_change(struct net_bridge *p,
static void br_multicast_local_router_expired(struct timer_list *t)
{
- struct net_bridge *br = from_timer(br, t, multicast_router_timer);
+ struct net_bridge *br = from_timer(br, t, ip4_mc_router_timer);
spin_lock(&br->multicast_lock);
if (br->multicast_router == MDB_RTR_TYPE_DISABLED ||
br->multicast_router == MDB_RTR_TYPE_PERM ||
- timer_pending(&br->multicast_router_timer))
+ timer_pending(&br->ip4_mc_router_timer))
goto out;
br_mc_router_state_change(br, false);
@@ -1613,7 +1613,7 @@ int br_multicast_add_port(struct net_bridge_port *port)
port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
port->multicast_eht_hosts_limit = BR_MCAST_DEFAULT_EHT_HOSTS_LIMIT;
- timer_setup(&port->multicast_router_timer,
+ timer_setup(&port->ip4_mc_router_timer,
br_multicast_router_expired, 0);
timer_setup(&port->ip4_own_query.timer,
br_ip4_multicast_port_query_expired, 0);
@@ -1649,7 +1649,7 @@ void br_multicast_del_port(struct net_bridge_port *port)
hlist_move_list(&br->mcast_gc_list, &deleted_head);
spin_unlock_bh(&br->multicast_lock);
br_multicast_gc(&deleted_head);
- del_timer_sync(&port->multicast_router_timer);
+ del_timer_sync(&port->ip4_mc_router_timer);
free_percpu(port->mcast_stats);
}
@@ -1674,7 +1674,7 @@ static void __br_multicast_enable_port(struct net_bridge_port *port)
br_multicast_enable(&port->ip6_own_query);
#endif
if (port->multicast_router == MDB_RTR_TYPE_PERM &&
- hlist_unhashed(&port->rlist))
+ hlist_unhashed(&port->ip4_rlist))
br_multicast_add_router(br, port);
}
@@ -1700,7 +1700,7 @@ void br_multicast_disable_port(struct net_bridge_port *port)
__del_port_router(port);
- del_timer(&port->multicast_router_timer);
+ del_timer(&port->ip4_mc_router_timer);
del_timer(&port->ip4_own_query.timer);
#if IS_ENABLED(CONFIG_IPV6)
del_timer(&port->ip6_own_query.timer);
@@ -2666,19 +2666,19 @@ static void br_multicast_add_router(struct net_bridge *br,
struct net_bridge_port *p;
struct hlist_node *slot = NULL;
- if (!hlist_unhashed(&port->rlist))
+ if (!hlist_unhashed(&port->ip4_rlist))
return;
- hlist_for_each_entry(p, &br->router_list, rlist) {
+ hlist_for_each_entry(p, &br->ip4_mc_router_list, ip4_rlist) {
if ((unsigned long) port >= (unsigned long) p)
break;
- slot = &p->rlist;
+ slot = &p->ip4_rlist;
}
if (slot)
- hlist_add_behind_rcu(&port->rlist, slot);
+ hlist_add_behind_rcu(&port->ip4_rlist, slot);
else
- hlist_add_head_rcu(&port->rlist, &br->router_list);
+ hlist_add_head_rcu(&port->ip4_rlist, &br->ip4_mc_router_list);
br_rtr_notify(br->dev, port, RTM_NEWMDB);
br_port_mc_router_state_change(port, true);
}
@@ -2690,9 +2690,9 @@ static void br_multicast_mark_router(struct net_bridge *br,
if (!port) {
if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) {
- if (!timer_pending(&br->multicast_router_timer))
+ if (!timer_pending(&br->ip4_mc_router_timer))
br_mc_router_state_change(br, true);
- mod_timer(&br->multicast_router_timer,
+ mod_timer(&br->ip4_mc_router_timer,
now + br->multicast_querier_interval);
}
return;
@@ -2704,7 +2704,7 @@ static void br_multicast_mark_router(struct net_bridge *br,
br_multicast_add_router(br, port);
- mod_timer(&port->multicast_router_timer,
+ mod_timer(&port->ip4_mc_router_timer,
now + br->multicast_querier_interval);
}
@@ -3316,7 +3316,7 @@ void br_multicast_init(struct net_bridge *br)
br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
spin_lock_init(&br->multicast_lock);
- timer_setup(&br->multicast_router_timer,
+ timer_setup(&br->ip4_mc_router_timer,
br_multicast_local_router_expired, 0);
timer_setup(&br->ip4_other_query.timer,
br_ip4_multicast_querier_expired, 0);
@@ -3416,7 +3416,7 @@ void br_multicast_open(struct net_bridge *br)
void br_multicast_stop(struct net_bridge *br)
{
- del_timer_sync(&br->multicast_router_timer);
+ del_timer_sync(&br->ip4_mc_router_timer);
del_timer_sync(&br->ip4_other_query.timer);
del_timer_sync(&br->ip4_own_query.timer);
#if IS_ENABLED(CONFIG_IPV6)
@@ -3453,7 +3453,7 @@ int br_multicast_set_router(struct net_bridge *br, unsigned long val)
case MDB_RTR_TYPE_DISABLED:
case MDB_RTR_TYPE_PERM:
br_mc_router_state_change(br, val == MDB_RTR_TYPE_PERM);
- del_timer(&br->multicast_router_timer);
+ del_timer(&br->ip4_mc_router_timer);
br->multicast_router = val;
err = 0;
break;
@@ -3472,9 +3472,9 @@ int br_multicast_set_router(struct net_bridge *br, unsigned long val)
static void __del_port_router(struct net_bridge_port *p)
{
- if (hlist_unhashed(&p->rlist))
+ if (hlist_unhashed(&p->ip4_rlist))
return;
- hlist_del_init_rcu(&p->rlist);
+ hlist_del_init_rcu(&p->ip4_rlist);
br_rtr_notify(p->br->dev, p, RTM_DELMDB);
br_port_mc_router_state_change(p, false);
@@ -3493,7 +3493,7 @@ int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
if (p->multicast_router == val) {
/* Refresh the temp router port timer */
if (p->multicast_router == MDB_RTR_TYPE_TEMP)
- mod_timer(&p->multicast_router_timer,
+ mod_timer(&p->ip4_mc_router_timer,
now + br->multicast_querier_interval);
err = 0;
goto unlock;
@@ -3502,7 +3502,7 @@ int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
case MDB_RTR_TYPE_DISABLED:
p->multicast_router = MDB_RTR_TYPE_DISABLED;
__del_port_router(p);
- del_timer(&p->multicast_router_timer);
+ del_timer(&p->ip4_mc_router_timer);
break;
case MDB_RTR_TYPE_TEMP_QUERY:
p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
@@ -3510,7 +3510,7 @@ int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
break;
case MDB_RTR_TYPE_PERM:
p->multicast_router = MDB_RTR_TYPE_PERM;
- del_timer(&p->multicast_router_timer);
+ del_timer(&p->ip4_mc_router_timer);
br_multicast_add_router(br, p);
break;
case MDB_RTR_TYPE_TEMP:
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 7ce8a77cc6b6..26e91d253687 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -307,6 +307,8 @@ struct net_bridge_port {
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
struct bridge_mcast_own_query ip4_own_query;
+ struct timer_list ip4_mc_router_timer;
+ struct hlist_node ip4_rlist;
#if IS_ENABLED(CONFIG_IPV6)
struct bridge_mcast_own_query ip6_own_query;
#endif /* IS_ENABLED(CONFIG_IPV6) */
@@ -314,9 +316,7 @@ struct net_bridge_port {
u32 multicast_eht_hosts_cnt;
unsigned char multicast_router;
struct bridge_mcast_stats __percpu *mcast_stats;
- struct timer_list multicast_router_timer;
struct hlist_head mglist;
- struct hlist_node rlist;
#endif
#ifdef CONFIG_SYSFS
@@ -449,9 +449,9 @@ struct net_bridge {
struct hlist_head mcast_gc_list;
struct hlist_head mdb_list;
- struct hlist_head router_list;
- struct timer_list multicast_router_timer;
+ struct hlist_head ip4_mc_router_list;
+ struct timer_list ip4_mc_router_timer;
struct bridge_mcast_other_query ip4_other_query;
struct bridge_mcast_own_query ip4_own_query;
struct bridge_mcast_querier ip4_querier;
@@ -868,7 +868,7 @@ static inline bool br_multicast_is_router(struct net_bridge *br)
{
return br->multicast_router == 2 ||
(br->multicast_router == 1 &&
- timer_pending(&br->multicast_router_timer));
+ timer_pending(&br->ip4_mc_router_timer));
}
static inline bool
From 44ebb081dc6934e43d3c7444f183d6426adeca21 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Linus=20L=C3=BCssing?= <linus.luessing@c0d3.blue>
Date: Thu, 13 May 2021 15:20:44 +0200
Subject: [PATCH 02/11] net: bridge: mcast: add wrappers for router node
retrieval
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
In preparation for the upcoming split of multicast router state into
their IPv4 and IPv6 variants and to avoid IPv6 #ifdef clutter later add
two wrapper functions for router node retrieval in the payload
forwarding code.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/bridge/br_forward.c | 5 +++--
net/bridge/br_private.h | 10 ++++++++++
2 files changed, 13 insertions(+), 2 deletions(-)
diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index eb9847ad40cf..07856362538f 100644
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -276,7 +276,8 @@ void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
bool allow_mode_include = true;
struct hlist_node *rp;
- rp = rcu_dereference(hlist_first_rcu(&br->ip4_mc_router_list));
+ rp = br_multicast_get_first_rport_node(br, skb);
+
if (mdst) {
p = rcu_dereference(mdst->ports);
if (br_multicast_should_handle_mode(br, mdst->addr.proto) &&
@@ -290,7 +291,7 @@ void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
struct net_bridge_port *port, *lport, *rport;
lport = p ? p->key.port : NULL;
- rport = hlist_entry_safe(rp, struct net_bridge_port, ip4_rlist);
+ rport = br_multicast_rport_from_node_skb(rp, skb);
if ((unsigned long)lport > (unsigned long)rport) {
port = lport;
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 26e91d253687..d970ef78bf98 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -864,6 +864,16 @@ static inline bool br_group_is_l2(const struct br_ip *group)
#define mlock_dereference(X, br) \
rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
+static inline struct hlist_node *
+br_multicast_get_first_rport_node(struct net_bridge *b, struct sk_buff *skb) {
+ return rcu_dereference(hlist_first_rcu(&b->ip4_mc_router_list));
+}
+
+static inline struct net_bridge_port *
+br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) {
+ return hlist_entry_safe(rp, struct net_bridge_port, ip4_rlist);
+}
+
static inline bool br_multicast_is_router(struct net_bridge *br)
{
return br->multicast_router == 2 ||
From ff391c5d9871894c620f1e6ae2b18d7db572e49d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Linus=20L=C3=BCssing?= <linus.luessing@c0d3.blue>
Date: Thu, 13 May 2021 15:20:45 +0200
Subject: [PATCH 03/11] net: bridge: mcast: prepare mdb netlink for mcast
router split
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
In preparation for the upcoming split of multicast router state into
their IPv4 and IPv6 variants and to avoid IPv6 #ifdef clutter later add
some inline functions for the protocol specific parts in the mdb router
netlink code. Also the we need iterate over the port instead of router
list to be able put one router port entry with both the IPv4 and IPv6
multicast router info later.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/bridge/br_mdb.c | 39 ++++++++++++++++++++++++++++++++++-----
1 file changed, 34 insertions(+), 5 deletions(-)
diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
index d61def8c4647..482edb9aadc7 100644
--- a/net/bridge/br_mdb.c
+++ b/net/bridge/br_mdb.c
@@ -16,29 +16,58 @@
#include "br_private.h"
+static bool br_rports_have_mc_router(struct net_bridge *br)
+{
+ return !hlist_empty(&br->ip4_mc_router_list);
+}
+
+static bool
+br_ip4_rports_get_timer(struct net_bridge_port *port, unsigned long *timer)
+{
+ *timer = br_timer_value(&port->ip4_mc_router_timer);
+ return !hlist_unhashed(&port->ip4_rlist);
+}
+
+static bool
+br_ip6_rports_get_timer(struct net_bridge_port *port, unsigned long *timer)
+{
+ *timer = 0;
+ return false;
+}
+
static int br_rports_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
struct net_device *dev)
{
struct net_bridge *br = netdev_priv(dev);
- struct net_bridge_port *p;
+ bool have_ip4_mc_rtr, have_ip6_mc_rtr;
+ unsigned long ip4_timer, ip6_timer;
struct nlattr *nest, *port_nest;
+ struct net_bridge_port *p;
- if (!br->multicast_router || hlist_empty(&br->ip4_mc_router_list))
+ if (!br->multicast_router)
+ return 0;
+
+ if (!br_rports_have_mc_router(br))
return 0;
nest = nla_nest_start_noflag(skb, MDBA_ROUTER);
if (nest == NULL)
return -EMSGSIZE;
- hlist_for_each_entry_rcu(p, &br->ip4_mc_router_list, ip4_rlist) {
- if (!p)
+ list_for_each_entry_rcu(p, &br->port_list, list) {
+ have_ip4_mc_rtr = br_ip4_rports_get_timer(p, &ip4_timer);
+ have_ip6_mc_rtr = br_ip6_rports_get_timer(p, &ip6_timer);
+
+ if (!have_ip4_mc_rtr && !have_ip6_mc_rtr)
continue;
+
port_nest = nla_nest_start_noflag(skb, MDBA_ROUTER_PORT);
if (!port_nest)
goto fail;
+
if (nla_put_nohdr(skb, sizeof(u32), &p->dev->ifindex) ||
nla_put_u32(skb, MDBA_ROUTER_PATTR_TIMER,
- br_timer_value(&p->ip4_mc_router_timer)) ||
+ max(ip4_timer, ip6_timer)) ||
nla_put_u8(skb, MDBA_ROUTER_PATTR_TYPE,
p->multicast_router)) {
nla_nest_cancel(skb, port_nest);
From b19232effd09c2cb5e11b1b74547406a3c9adc5a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Linus=20L=C3=BCssing?= <linus.luessing@c0d3.blue>
Date: Thu, 13 May 2021 15:20:46 +0200
Subject: [PATCH 04/11] net: bridge: mcast: prepare query reception for mcast
router split
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
In preparation for the upcoming split of multicast router state into
their IPv4 and IPv6 variants and as the br_multicast_mark_router() will
be split for that remove the select querier wrapper and instead add
ip4 and ip6 variants for br_multicast_query_received().
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/bridge/br_multicast.c | 53 ++++++++++++++++++++-------------------
1 file changed, 27 insertions(+), 26 deletions(-)
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 6fe93a30b575..7edbbc9941ea 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -2615,22 +2615,6 @@ update:
}
#endif
-static bool br_multicast_select_querier(struct net_bridge *br,
- struct net_bridge_port *port,
- struct br_ip *saddr)
-{
- switch (saddr->proto) {
- case htons(ETH_P_IP):
- return br_ip4_multicast_select_querier(br, port, saddr->src.ip4);
-#if IS_ENABLED(CONFIG_IPV6)
- case htons(ETH_P_IPV6):
- return br_ip6_multicast_select_querier(br, port, &saddr->src.ip6);
-#endif
- }
-
- return false;
-}
-
static void
br_multicast_update_query_timer(struct net_bridge *br,
struct bridge_mcast_other_query *query,
@@ -2708,19 +2692,36 @@ static void br_multicast_mark_router(struct net_bridge *br,
now + br->multicast_querier_interval);
}
-static void br_multicast_query_received(struct net_bridge *br,
- struct net_bridge_port *port,
- struct bridge_mcast_other_query *query,
- struct br_ip *saddr,
- unsigned long max_delay)
+static void
+br_ip4_multicast_query_received(struct net_bridge *br,
+ struct net_bridge_port *port,
+ struct bridge_mcast_other_query *query,
+ struct br_ip *saddr,
+ unsigned long max_delay)
{
- if (!br_multicast_select_querier(br, port, saddr))
+ if (!br_ip4_multicast_select_querier(br, port, saddr->src.ip4))
return;
br_multicast_update_query_timer(br, query, max_delay);
br_multicast_mark_router(br, port);
}
+#if IS_ENABLED(CONFIG_IPV6)
+static void
+br_ip6_multicast_query_received(struct net_bridge *br,
+ struct net_bridge_port *port,
+ struct bridge_mcast_other_query *query,
+ struct br_ip *saddr,
+ unsigned long max_delay)
+{
+ if (!br_ip6_multicast_select_querier(br, port, &saddr->src.ip6))
+ return;
+
+ br_multicast_update_query_timer(br, query, max_delay);
+ br_multicast_mark_router(br, port);
+}
+#endif
+
static void br_ip4_multicast_query(struct net_bridge *br,
struct net_bridge_port *port,
struct sk_buff *skb,
@@ -2768,8 +2769,8 @@ static void br_ip4_multicast_query(struct net_bridge *br,
saddr.proto = htons(ETH_P_IP);
saddr.src.ip4 = iph->saddr;
- br_multicast_query_received(br, port, &br->ip4_other_query,
- &saddr, max_delay);
+ br_ip4_multicast_query_received(br, port, &br->ip4_other_query,
+ &saddr, max_delay);
goto out;
}
@@ -2856,8 +2857,8 @@ static int br_ip6_multicast_query(struct net_bridge *br,
saddr.proto = htons(ETH_P_IPV6);
saddr.src.ip6 = ipv6_hdr(skb)->saddr;
- br_multicast_query_received(br, port, &br->ip6_other_query,
- &saddr, max_delay);
+ br_ip6_multicast_query_received(br, port, &br->ip6_other_query,
+ &saddr, max_delay);
goto out;
} else if (!group) {
goto out;
From 1a3065a26807b4cdd65d3b696ddb18385610f7da Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Linus=20L=C3=BCssing?= <linus.luessing@c0d3.blue>
Date: Thu, 13 May 2021 15:20:47 +0200
Subject: [PATCH 05/11] net: bridge: mcast: prepare is-router function for
mcast router split
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
In preparation for the upcoming split of multicast router state into
their IPv4 and IPv6 variants make br_multicast_is_router() protocol
family aware.
Note that for now br_ip6_multicast_is_router() uses the currently still
common ip4_mc_router_timer for now. It will be renamed to
ip6_mc_router_timer later when the split is performed.
While at it also renames the "1" and "2" constants in
br_multicast_is_router() to the MDB_RTR_TYPE_TEMP_QUERY and
MDB_RTR_TYPE_PERM enums.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/bridge/br_input.c | 2 +-
net/bridge/br_multicast.c | 5 +++--
net/bridge/br_private.h | 37 +++++++++++++++++++++++++++++++++----
3 files changed, 37 insertions(+), 7 deletions(-)
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index 8875e953ac53..1f506309efa8 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -132,7 +132,7 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb
if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) &&
br_multicast_querier_exists(br, eth_hdr(skb), mdst)) {
if ((mdst && mdst->host_joined) ||
- br_multicast_is_router(br)) {
+ br_multicast_is_router(br, skb)) {
local_rcv = true;
br->dev->stats.multicast++;
}
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 7edbbc9941ea..048b5b9e9c89 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -1391,7 +1391,8 @@ static void br_multicast_local_router_expired(struct timer_list *t)
spin_lock(&br->multicast_lock);
if (br->multicast_router == MDB_RTR_TYPE_DISABLED ||
br->multicast_router == MDB_RTR_TYPE_PERM ||
- timer_pending(&br->ip4_mc_router_timer))
+ br_ip4_multicast_is_router(br) ||
+ br_ip6_multicast_is_router(br))
goto out;
br_mc_router_state_change(br, false);
@@ -3622,7 +3623,7 @@ bool br_multicast_router(const struct net_device *dev)
bool is_router;
spin_lock_bh(&br->multicast_lock);
- is_router = br_multicast_is_router(br);
+ is_router = br_multicast_is_router(br, NULL);
spin_unlock_bh(&br->multicast_lock);
return is_router;
}
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index d970ef78bf98..f9a381fcff09 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -874,11 +874,40 @@ br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) {
return hlist_entry_safe(rp, struct net_bridge_port, ip4_rlist);
}
-static inline bool br_multicast_is_router(struct net_bridge *br)
+static inline bool br_ip4_multicast_is_router(struct net_bridge *br)
{
- return br->multicast_router == 2 ||
- (br->multicast_router == 1 &&
- timer_pending(&br->ip4_mc_router_timer));
+ return timer_pending(&br->ip4_mc_router_timer);
+}
+
+static inline bool br_ip6_multicast_is_router(struct net_bridge *br)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+ return timer_pending(&br->ip4_mc_router_timer);
+#else
+ return false;
+#endif
+}
+
+static inline bool
+br_multicast_is_router(struct net_bridge *br, struct sk_buff *skb)
+{
+ switch (br->multicast_router) {
+ case MDB_RTR_TYPE_PERM:
+ return true;
+ case MDB_RTR_TYPE_TEMP_QUERY:
+ if (skb) {
+ if (skb->protocol == htons(ETH_P_IP))
+ return br_ip4_multicast_is_router(br);
+ else if (skb->protocol == htons(ETH_P_IPV6))
+ return br_ip6_multicast_is_router(br);
+ } else {
+ return br_ip4_multicast_is_router(br) ||
+ br_ip6_multicast_is_router(br);
+ }
+ fallthrough;
+ default:
+ return false;
+ }
}
static inline bool
From ee5fb2223ee581676fe7e4e5a87481c419569454 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Linus=20L=C3=BCssing?= <linus.luessing@c0d3.blue>
Date: Thu, 13 May 2021 15:20:48 +0200
Subject: [PATCH 06/11] net: bridge: mcast: prepare expiry functions for mcast
router split
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
In preparation for the upcoming split of multicast router state into
their IPv4 and IPv6 variants move the protocol specific timer access to
an ip4 wrapper function.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/bridge/br_multicast.c | 31 ++++++++++++++++++++++---------
1 file changed, 22 insertions(+), 9 deletions(-)
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 048b5b9e9c89..781599155d8a 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -1354,16 +1354,16 @@ static int br_ip6_multicast_add_group(struct net_bridge *br,
}
#endif
-static void br_multicast_router_expired(struct timer_list *t)
+static void br_multicast_router_expired(struct net_bridge_port *port,
+ struct timer_list *t,
+ struct hlist_node *rlist)
{
- struct net_bridge_port *port =
- from_timer(port, t, ip4_mc_router_timer);
struct net_bridge *br = port->br;
spin_lock(&br->multicast_lock);
if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
port->multicast_router == MDB_RTR_TYPE_PERM ||
- timer_pending(&port->ip4_mc_router_timer))
+ timer_pending(t))
goto out;
__del_port_router(port);
@@ -1371,6 +1371,13 @@ out:
spin_unlock(&br->multicast_lock);
}
+static void br_ip4_multicast_router_expired(struct timer_list *t)
+{
+ struct net_bridge_port *port = from_timer(port, t, ip4_mc_router_timer);
+
+ br_multicast_router_expired(port, t, &port->ip4_rlist);
+}
+
static void br_mc_router_state_change(struct net_bridge *p,
bool is_mc_router)
{
@@ -1384,10 +1391,9 @@ static void br_mc_router_state_change(struct net_bridge *p,
switchdev_port_attr_set(p->dev, &attr, NULL);
}
-static void br_multicast_local_router_expired(struct timer_list *t)
+static void br_multicast_local_router_expired(struct net_bridge *br,
+ struct timer_list *timer)
{
- struct net_bridge *br = from_timer(br, t, ip4_mc_router_timer);
-
spin_lock(&br->multicast_lock);
if (br->multicast_router == MDB_RTR_TYPE_DISABLED ||
br->multicast_router == MDB_RTR_TYPE_PERM ||
@@ -1400,6 +1406,13 @@ out:
spin_unlock(&br->multicast_lock);
}
+static void br_ip4_multicast_local_router_expired(struct timer_list *t)
+{
+ struct net_bridge *br = from_timer(br, t, ip4_mc_router_timer);
+
+ br_multicast_local_router_expired(br, t);
+}
+
static void br_multicast_querier_expired(struct net_bridge *br,
struct bridge_mcast_own_query *query)
{
@@ -1615,7 +1628,7 @@ int br_multicast_add_port(struct net_bridge_port *port)
port->multicast_eht_hosts_limit = BR_MCAST_DEFAULT_EHT_HOSTS_LIMIT;
timer_setup(&port->ip4_mc_router_timer,
- br_multicast_router_expired, 0);
+ br_ip4_multicast_router_expired, 0);
timer_setup(&port->ip4_own_query.timer,
br_ip4_multicast_port_query_expired, 0);
#if IS_ENABLED(CONFIG_IPV6)
@@ -3319,7 +3332,7 @@ void br_multicast_init(struct net_bridge *br)
spin_lock_init(&br->multicast_lock);
timer_setup(&br->ip4_mc_router_timer,
- br_multicast_local_router_expired, 0);
+ br_ip4_multicast_local_router_expired, 0);
timer_setup(&br->ip4_other_query.timer,
br_ip4_multicast_querier_expired, 0);
timer_setup(&br->ip4_own_query.timer,
From d9b8c4d8d937f58e618aa1e756162e80b385c701 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Linus=20L=C3=BCssing?= <linus.luessing@c0d3.blue>
Date: Thu, 13 May 2021 15:20:49 +0200
Subject: [PATCH 07/11] net: bridge: mcast: prepare add-router function for
mcast router split
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
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@c0d3.blue>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/bridge/br_multicast.c | 117 +++++++++++++++++++++++++++-----------
1 file changed, 85 insertions(+), 32 deletions(-)
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 781599155d8a..dc9546415520 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
+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 hlist_node *slot = NULL;
+ struct net_bridge_port *p;
+ struct hlist_node *rlist;
+
+ hlist_for_each(rlist, mc_router_list) {
+ p = br_multicast_rport_from_node(br, mc_router_list, rlist);
+
+ if ((unsigned long)port >= (unsigned long)p)
+ break;
+
+ 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 net_bridge_port *port,
+ struct hlist_node *rlist,
+ struct hlist_head *mc_router_list)
{
- struct net_bridge_port *p;
- struct hlist_node *slot = NULL;
+ struct hlist_node *slot;
- if (!hlist_unhashed(&port->ip4_rlist))
+ if (!hlist_unhashed(rlist))
return;
- hlist_for_each_entry(p, &br->ip4_mc_router_list, ip4_rlist) {
- if ((unsigned long) port >= (unsigned long) p)
- break;
- slot = &p->ip4_rlist;
- }
+ 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;
From ed2d35971a8066aa24ce65dd66c113c0506bb206 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Linus=20L=C3=BCssing?= <linus.luessing@c0d3.blue>
Date: Thu, 13 May 2021 15:20:50 +0200
Subject: [PATCH 08/11] net: bridge: mcast: split router port del+notify for
mcast router split
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
In preparation for the upcoming split of multicast router state into
their IPv4 and IPv6 variants split router port deletion and notification
into two functions. When we disable a port for instance later we want to
only send one notification to switchdev and netlink for compatibility
and want to avoid sending one for IPv4 and one for IPv6. For that the
split is needed.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/bridge/br_multicast.c | 40 ++++++++++++++++++++++++++++++---------
1 file changed, 31 insertions(+), 9 deletions(-)
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index dc9546415520..30144f9d19d7 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -60,7 +60,8 @@ static void br_ip4_multicast_leave_group(struct net_bridge *br,
const unsigned char *src);
static void br_multicast_port_group_rexmit(struct timer_list *t);
-static void __del_port_router(struct net_bridge_port *p);
+static void
+br_multicast_rport_del_notify(struct net_bridge_port *p, bool deleted);
#if IS_ENABLED(CONFIG_IPV6)
static void br_ip6_multicast_leave_group(struct net_bridge *br,
struct net_bridge_port *port,
@@ -1354,11 +1355,26 @@ static int br_ip6_multicast_add_group(struct net_bridge *br,
}
#endif
+static bool br_multicast_rport_del(struct hlist_node *rlist)
+{
+ if (hlist_unhashed(rlist))
+ return false;
+
+ hlist_del_init_rcu(rlist);
+ return true;
+}
+
+static bool br_ip4_multicast_rport_del(struct net_bridge_port *p)
+{
+ return br_multicast_rport_del(&p->ip4_rlist);
+}
+
static void br_multicast_router_expired(struct net_bridge_port *port,
struct timer_list *t,
struct hlist_node *rlist)
{
struct net_bridge *br = port->br;
+ bool del;
spin_lock(&br->multicast_lock);
if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
@@ -1366,7 +1382,8 @@ static void br_multicast_router_expired(struct net_bridge_port *port,
timer_pending(t))
goto out;
- __del_port_router(port);
+ del = br_multicast_rport_del(rlist);
+ br_multicast_rport_del_notify(port, del);
out:
spin_unlock(&br->multicast_lock);
}
@@ -1705,19 +1722,20 @@ void br_multicast_disable_port(struct net_bridge_port *port)
struct net_bridge *br = port->br;
struct net_bridge_port_group *pg;
struct hlist_node *n;
+ bool del = false;
spin_lock(&br->multicast_lock);
hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
if (!(pg->flags & MDB_PG_FLAGS_PERMANENT))
br_multicast_find_del_pg(br, pg);
- __del_port_router(port);
-
+ del |= br_ip4_multicast_rport_del(port);
del_timer(&port->ip4_mc_router_timer);
del_timer(&port->ip4_own_query.timer);
#if IS_ENABLED(CONFIG_IPV6)
del_timer(&port->ip6_own_query.timer);
#endif
+ br_multicast_rport_del_notify(port, del);
spin_unlock(&br->multicast_lock);
}
@@ -3538,11 +3556,12 @@ int br_multicast_set_router(struct net_bridge *br, unsigned long val)
return err;
}
-static void __del_port_router(struct net_bridge_port *p)
+static void
+br_multicast_rport_del_notify(struct net_bridge_port *p, bool deleted)
{
- if (hlist_unhashed(&p->ip4_rlist))
+ if (!deleted)
return;
- hlist_del_init_rcu(&p->ip4_rlist);
+
br_rtr_notify(p->br->dev, p, RTM_DELMDB);
br_port_mc_router_state_change(p, false);
@@ -3556,6 +3575,7 @@ int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
struct net_bridge *br = p->br;
unsigned long now = jiffies;
int err = -EINVAL;
+ bool del = false;
spin_lock(&br->multicast_lock);
if (p->multicast_router == val) {
@@ -3569,12 +3589,14 @@ int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
switch (val) {
case MDB_RTR_TYPE_DISABLED:
p->multicast_router = MDB_RTR_TYPE_DISABLED;
- __del_port_router(p);
+ del |= br_ip4_multicast_rport_del(p);
del_timer(&p->ip4_mc_router_timer);
+ br_multicast_rport_del_notify(p, del);
break;
case MDB_RTR_TYPE_TEMP_QUERY:
p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
- __del_port_router(p);
+ del |= br_ip4_multicast_rport_del(p);
+ br_multicast_rport_del_notify(p, del);
break;
case MDB_RTR_TYPE_PERM:
p->multicast_router = MDB_RTR_TYPE_PERM;
From a3c02e769efe66dce5e2c716862b60c8d44d191e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Linus=20L=C3=BCssing?= <linus.luessing@c0d3.blue>
Date: Thu, 13 May 2021 15:20:51 +0200
Subject: [PATCH 09/11] net: bridge: mcast: split multicast router state for
IPv4 and IPv6
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
A multicast router for IPv4 does not imply that the same host also is a
multicast router for IPv6 and vice versa.
To reduce multicast traffic when a host is only a multicast router for
one of these two protocol families, keep router state for IPv4 and IPv6
separately. Similar to how querier state is kept separately.
For backwards compatibility for netlink and switchdev notifications
these two will still only notify if a port switched from either no
IPv4/IPv6 multicast router to any IPv4/IPv6 multicast router or the
other way round. However a full netlink MDB router dump will now also
include a multicast router timeout for both IPv4 and IPv6.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/bridge/br_mdb.c | 10 +++
net/bridge/br_multicast.c | 134 ++++++++++++++++++++++++++++++++++++--
net/bridge/br_private.h | 14 +++-
3 files changed, 151 insertions(+), 7 deletions(-)
diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
index 482edb9aadc7..10c416c7bf47 100644
--- a/net/bridge/br_mdb.c
+++ b/net/bridge/br_mdb.c
@@ -18,7 +18,12 @@
static bool br_rports_have_mc_router(struct net_bridge *br)
{
+#if IS_ENABLED(CONFIG_IPV6)
+ return !hlist_empty(&br->ip4_mc_router_list) ||
+ !hlist_empty(&br->ip6_mc_router_list);
+#else
return !hlist_empty(&br->ip4_mc_router_list);
+#endif
}
static bool
@@ -31,8 +36,13 @@ br_ip4_rports_get_timer(struct net_bridge_port *port, unsigned long *timer)
static bool
br_ip6_rports_get_timer(struct net_bridge_port *port, unsigned long *timer)
{
+#if IS_ENABLED(CONFIG_IPV6)
+ *timer = br_timer_value(&port->ip6_mc_router_timer);
+ return !hlist_unhashed(&port->ip6_rlist);
+#else
*timer = 0;
return false;
+#endif
}
static int br_rports_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 30144f9d19d7..f234c48036c8 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -63,6 +63,8 @@ static void br_multicast_port_group_rexmit(struct timer_list *t);
static void
br_multicast_rport_del_notify(struct net_bridge_port *p, bool deleted);
#if IS_ENABLED(CONFIG_IPV6)
+static void br_ip6_multicast_add_router(struct net_bridge *br,
+ struct net_bridge_port *port);
static void br_ip6_multicast_leave_group(struct net_bridge *br,
struct net_bridge_port *port,
const struct in6_addr *group,
@@ -1369,6 +1371,15 @@ static bool br_ip4_multicast_rport_del(struct net_bridge_port *p)
return br_multicast_rport_del(&p->ip4_rlist);
}
+static bool br_ip6_multicast_rport_del(struct net_bridge_port *p)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+ return br_multicast_rport_del(&p->ip6_rlist);
+#else
+ return false;
+#endif
+}
+
static void br_multicast_router_expired(struct net_bridge_port *port,
struct timer_list *t,
struct hlist_node *rlist)
@@ -1395,6 +1406,15 @@ static void br_ip4_multicast_router_expired(struct timer_list *t)
br_multicast_router_expired(port, t, &port->ip4_rlist);
}
+#if IS_ENABLED(CONFIG_IPV6)
+static void br_ip6_multicast_router_expired(struct timer_list *t)
+{
+ struct net_bridge_port *port = from_timer(port, t, ip6_mc_router_timer);
+
+ br_multicast_router_expired(port, t, &port->ip6_rlist);
+}
+#endif
+
static void br_mc_router_state_change(struct net_bridge *p,
bool is_mc_router)
{
@@ -1430,6 +1450,15 @@ static void br_ip4_multicast_local_router_expired(struct timer_list *t)
br_multicast_local_router_expired(br, t);
}
+#if IS_ENABLED(CONFIG_IPV6)
+static void br_ip6_multicast_local_router_expired(struct timer_list *t)
+{
+ struct net_bridge *br = from_timer(br, t, ip6_mc_router_timer);
+
+ br_multicast_local_router_expired(br, t);
+}
+#endif
+
static void br_multicast_querier_expired(struct net_bridge *br,
struct bridge_mcast_own_query *query)
{
@@ -1649,6 +1678,8 @@ int br_multicast_add_port(struct net_bridge_port *port)
timer_setup(&port->ip4_own_query.timer,
br_ip4_multicast_port_query_expired, 0);
#if IS_ENABLED(CONFIG_IPV6)
+ timer_setup(&port->ip6_mc_router_timer,
+ br_ip6_multicast_router_expired, 0);
timer_setup(&port->ip6_own_query.timer,
br_ip6_multicast_port_query_expired, 0);
#endif
@@ -1681,6 +1712,9 @@ void br_multicast_del_port(struct net_bridge_port *port)
spin_unlock_bh(&br->multicast_lock);
br_multicast_gc(&deleted_head);
del_timer_sync(&port->ip4_mc_router_timer);
+#if IS_ENABLED(CONFIG_IPV6)
+ del_timer_sync(&port->ip6_mc_router_timer);
+#endif
free_percpu(port->mcast_stats);
}
@@ -1704,8 +1738,10 @@ 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)
+ if (port->multicast_router == MDB_RTR_TYPE_PERM) {
br_ip4_multicast_add_router(br, port);
+ br_ip6_multicast_add_router(br, port);
+ }
}
void br_multicast_enable_port(struct net_bridge_port *port)
@@ -1732,7 +1768,9 @@ void br_multicast_disable_port(struct net_bridge_port *port)
del |= br_ip4_multicast_rport_del(port);
del_timer(&port->ip4_mc_router_timer);
del_timer(&port->ip4_own_query.timer);
+ del |= br_ip6_multicast_rport_del(port);
#if IS_ENABLED(CONFIG_IPV6)
+ del_timer(&port->ip6_mc_router_timer);
del_timer(&port->ip6_own_query.timer);
#endif
br_multicast_rport_del_notify(port, del);
@@ -2675,6 +2713,10 @@ br_multicast_rport_from_node(struct net_bridge *br,
struct hlist_head *mc_router_list,
struct hlist_node *rlist)
{
+#if IS_ENABLED(CONFIG_IPV6)
+ if (mc_router_list == &br->ip6_mc_router_list)
+ return hlist_entry(rlist, struct net_bridge_port, ip6_rlist);
+#endif
return hlist_entry(rlist, struct net_bridge_port, ip4_rlist);
}
@@ -2700,6 +2742,19 @@ br_multicast_get_rport_slot(struct net_bridge *br,
return slot;
}
+static bool br_multicast_no_router_otherpf(struct net_bridge_port *port,
+ struct hlist_node *rnode)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+ if (rnode != &port->ip6_rlist)
+ return hlist_unhashed(&port->ip6_rlist);
+ else
+ return hlist_unhashed(&port->ip4_rlist);
+#else
+ return true;
+#endif
+}
+
/* Add port to router_list
* list is maintained ordered by pointer value
* and locked by br->multicast_lock and RCU
@@ -2721,8 +2776,14 @@ static void br_multicast_add_router(struct net_bridge *br,
else
hlist_add_head_rcu(rlist, mc_router_list);
- br_rtr_notify(br->dev, port, RTM_NEWMDB);
- br_port_mc_router_state_change(port, true);
+ /* For backwards compatibility for now, only notify if we
+ * switched from no IPv4/IPv6 multicast router to a new
+ * IPv4 or IPv6 multicast router.
+ */
+ if (br_multicast_no_router_otherpf(port, rlist)) {
+ br_rtr_notify(br->dev, port, RTM_NEWMDB);
+ br_port_mc_router_state_change(port, true);
+ }
}
/* Add port to router_list
@@ -2736,6 +2797,19 @@ static void br_ip4_multicast_add_router(struct net_bridge *br,
&br->ip4_mc_router_list);
}
+/* Add port to router_list
+ * list is maintained ordered by pointer value
+ * and locked by br->multicast_lock and RCU
+ */
+static void br_ip6_multicast_add_router(struct net_bridge *br,
+ struct net_bridge_port *port)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+ br_multicast_add_router(br, port, &port->ip6_rlist,
+ &br->ip6_mc_router_list);
+#endif
+}
+
static void br_multicast_mark_router(struct net_bridge *br,
struct net_bridge_port *port,
struct timer_list *timer,
@@ -2777,6 +2851,23 @@ static void br_ip4_multicast_mark_router(struct net_bridge *br,
&br->ip4_mc_router_list);
}
+static void br_ip6_multicast_mark_router(struct net_bridge *br,
+ struct net_bridge_port *port)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+ struct timer_list *timer = &br->ip6_mc_router_timer;
+ struct hlist_node *rlist = NULL;
+
+ if (port) {
+ timer = &port->ip6_mc_router_timer;
+ rlist = &port->ip6_rlist;
+ }
+
+ br_multicast_mark_router(br, port, timer, rlist,
+ &br->ip6_mc_router_list);
+#endif
+}
+
static void
br_ip4_multicast_query_received(struct net_bridge *br,
struct net_bridge_port *port,
@@ -2803,7 +2894,7 @@ br_ip6_multicast_query_received(struct net_bridge *br,
return;
br_multicast_update_query_timer(br, query, max_delay);
- br_ip4_multicast_mark_router(br, port);
+ br_ip6_multicast_mark_router(br, port);
}
#endif
@@ -3252,7 +3343,7 @@ static void br_ip6_multicast_mrd_rcv(struct net_bridge *br,
if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV)
return;
- br_ip4_multicast_mark_router(br, port);
+ br_ip6_multicast_mark_router(br, port);
}
static int br_multicast_ipv6_rcv(struct net_bridge *br,
@@ -3409,6 +3500,8 @@ void br_multicast_init(struct net_bridge *br)
timer_setup(&br->ip4_own_query.timer,
br_ip4_multicast_query_expired, 0);
#if IS_ENABLED(CONFIG_IPV6)
+ timer_setup(&br->ip6_mc_router_timer,
+ br_ip6_multicast_local_router_expired, 0);
timer_setup(&br->ip6_other_query.timer,
br_ip6_multicast_querier_expired, 0);
timer_setup(&br->ip6_own_query.timer,
@@ -3506,6 +3599,7 @@ void br_multicast_stop(struct net_bridge *br)
del_timer_sync(&br->ip4_other_query.timer);
del_timer_sync(&br->ip4_own_query.timer);
#if IS_ENABLED(CONFIG_IPV6)
+ del_timer_sync(&br->ip6_mc_router_timer);
del_timer_sync(&br->ip6_other_query.timer);
del_timer_sync(&br->ip6_own_query.timer);
#endif
@@ -3540,6 +3634,9 @@ int br_multicast_set_router(struct net_bridge *br, unsigned long val)
case MDB_RTR_TYPE_PERM:
br_mc_router_state_change(br, val == MDB_RTR_TYPE_PERM);
del_timer(&br->ip4_mc_router_timer);
+#if IS_ENABLED(CONFIG_IPV6)
+ del_timer(&br->ip6_mc_router_timer);
+#endif
br->multicast_router = val;
err = 0;
break;
@@ -3562,6 +3659,16 @@ br_multicast_rport_del_notify(struct net_bridge_port *p, bool deleted)
if (!deleted)
return;
+ /* For backwards compatibility for now, only notify if there is
+ * no multicast router anymore for both IPv4 and IPv6.
+ */
+ if (!hlist_unhashed(&p->ip4_rlist))
+ return;
+#if IS_ENABLED(CONFIG_IPV6)
+ if (!hlist_unhashed(&p->ip6_rlist))
+ return;
+#endif
+
br_rtr_notify(p->br->dev, p, RTM_DELMDB);
br_port_mc_router_state_change(p, false);
@@ -3580,9 +3687,14 @@ int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
spin_lock(&br->multicast_lock);
if (p->multicast_router == val) {
/* Refresh the temp router port timer */
- if (p->multicast_router == MDB_RTR_TYPE_TEMP)
+ if (p->multicast_router == MDB_RTR_TYPE_TEMP) {
mod_timer(&p->ip4_mc_router_timer,
now + br->multicast_querier_interval);
+#if IS_ENABLED(CONFIG_IPV6)
+ mod_timer(&p->ip6_mc_router_timer,
+ now + br->multicast_querier_interval);
+#endif
+ }
err = 0;
goto unlock;
}
@@ -3591,21 +3703,31 @@ int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
p->multicast_router = MDB_RTR_TYPE_DISABLED;
del |= br_ip4_multicast_rport_del(p);
del_timer(&p->ip4_mc_router_timer);
+ del |= br_ip6_multicast_rport_del(p);
+#if IS_ENABLED(CONFIG_IPV6)
+ del_timer(&p->ip6_mc_router_timer);
+#endif
br_multicast_rport_del_notify(p, del);
break;
case MDB_RTR_TYPE_TEMP_QUERY:
p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
del |= br_ip4_multicast_rport_del(p);
+ del |= br_ip6_multicast_rport_del(p);
br_multicast_rport_del_notify(p, del);
break;
case MDB_RTR_TYPE_PERM:
p->multicast_router = MDB_RTR_TYPE_PERM;
del_timer(&p->ip4_mc_router_timer);
br_ip4_multicast_add_router(br, p);
+#if IS_ENABLED(CONFIG_IPV6)
+ del_timer(&p->ip6_mc_router_timer);
+#endif
+ br_ip6_multicast_add_router(br, p);
break;
case MDB_RTR_TYPE_TEMP:
p->multicast_router = MDB_RTR_TYPE_TEMP;
br_ip4_multicast_mark_router(br, p);
+ br_ip6_multicast_mark_router(br, p);
break;
default:
goto unlock;
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index f9a381fcff09..03197ab4af76 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -311,6 +311,8 @@ struct net_bridge_port {
struct hlist_node ip4_rlist;
#if IS_ENABLED(CONFIG_IPV6)
struct bridge_mcast_own_query ip6_own_query;
+ struct timer_list ip6_mc_router_timer;
+ struct hlist_node ip6_rlist;
#endif /* IS_ENABLED(CONFIG_IPV6) */
u32 multicast_eht_hosts_limit;
u32 multicast_eht_hosts_cnt;
@@ -457,6 +459,8 @@ struct net_bridge {
struct bridge_mcast_querier ip4_querier;
struct bridge_mcast_stats __percpu *mcast_stats;
#if IS_ENABLED(CONFIG_IPV6)
+ struct hlist_head ip6_mc_router_list;
+ struct timer_list ip6_mc_router_timer;
struct bridge_mcast_other_query ip6_other_query;
struct bridge_mcast_own_query ip6_own_query;
struct bridge_mcast_querier ip6_querier;
@@ -866,11 +870,19 @@ static inline bool br_group_is_l2(const struct br_ip *group)
static inline struct hlist_node *
br_multicast_get_first_rport_node(struct net_bridge *b, struct sk_buff *skb) {
+#if IS_ENABLED(CONFIG_IPV6)
+ if (skb->protocol == htons(ETH_P_IPV6))
+ return rcu_dereference(hlist_first_rcu(&b->ip6_mc_router_list));
+#endif
return rcu_dereference(hlist_first_rcu(&b->ip4_mc_router_list));
}
static inline struct net_bridge_port *
br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) {
+#if IS_ENABLED(CONFIG_IPV6)
+ if (skb->protocol == htons(ETH_P_IPV6))
+ return hlist_entry_safe(rp, struct net_bridge_port, ip6_rlist);
+#endif
return hlist_entry_safe(rp, struct net_bridge_port, ip4_rlist);
}
@@ -882,7 +894,7 @@ static inline bool br_ip4_multicast_is_router(struct net_bridge *br)
static inline bool br_ip6_multicast_is_router(struct net_bridge *br)
{
#if IS_ENABLED(CONFIG_IPV6)
- return timer_pending(&br->ip4_mc_router_timer);
+ return timer_pending(&br->ip6_mc_router_timer);
#else
return false;
#endif
From b7fb0916544de44ce099d9f3b6129c86b484de25 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Linus=20L=C3=BCssing?= <linus.luessing@c0d3.blue>
Date: Thu, 13 May 2021 15:20:52 +0200
Subject: [PATCH 10/11] net: bridge: mcast: add ip4+ip6 mcast router timers to
mdb netlink
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Now that we have split the multicast router state into two, one for IPv4
and one for IPv6, also add individual timers to the mdb netlink router
port dump. Leaving the old timer attribute for backwards compatibility.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
include/uapi/linux/if_bridge.h | 2 ++
net/bridge/br_mdb.c | 8 +++++++-
2 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h
index 13d59c51ef5b..6b56a7549531 100644
--- a/include/uapi/linux/if_bridge.h
+++ b/include/uapi/linux/if_bridge.h
@@ -627,6 +627,8 @@ enum {
MDBA_ROUTER_PATTR_UNSPEC,
MDBA_ROUTER_PATTR_TIMER,
MDBA_ROUTER_PATTR_TYPE,
+ MDBA_ROUTER_PATTR_INET_TIMER,
+ MDBA_ROUTER_PATTR_INET6_TIMER,
__MDBA_ROUTER_PATTR_MAX
};
#define MDBA_ROUTER_PATTR_MAX (__MDBA_ROUTER_PATTR_MAX - 1)
diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
index 10c416c7bf47..3f839a8cc9fb 100644
--- a/net/bridge/br_mdb.c
+++ b/net/bridge/br_mdb.c
@@ -79,7 +79,13 @@ static int br_rports_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
nla_put_u32(skb, MDBA_ROUTER_PATTR_TIMER,
max(ip4_timer, ip6_timer)) ||
nla_put_u8(skb, MDBA_ROUTER_PATTR_TYPE,
- p->multicast_router)) {
+ p->multicast_router) ||
+ (have_ip4_mc_rtr &&
+ nla_put_u32(skb, MDBA_ROUTER_PATTR_INET_TIMER,
+ ip4_timer)) ||
+ (have_ip6_mc_rtr &&
+ nla_put_u32(skb, MDBA_ROUTER_PATTR_INET6_TIMER,
+ ip6_timer))) {
nla_nest_cancel(skb, port_nest);
goto fail;
}
From 3b85f9ba3480c1bcbebb2bb490822bec0e7a1201 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Linus=20L=C3=BCssing?= <linus.luessing@c0d3.blue>
Date: Thu, 13 May 2021 15:20:53 +0200
Subject: [PATCH 11/11] net: bridge: mcast: export multicast router presence
adjacent to a port
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
To properly support routable multicast addresses in batman-adv in a
group-aware way, a batman-adv node needs to know if it serves multicast
routers.
This adds a function to the bridge to export this so that batman-adv
can then make full use of the Multicast Router Discovery capability of
the bridge.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
include/linux/if_bridge.h | 8 ++++++
net/bridge/br_multicast.c | 55 +++++++++++++++++++++++++++++++++++++++
2 files changed, 63 insertions(+)
diff --git a/include/linux/if_bridge.h b/include/linux/if_bridge.h
index 2cc35038a8ca..12e9a32dbca0 100644
--- a/include/linux/if_bridge.h
+++ b/include/linux/if_bridge.h
@@ -67,6 +67,7 @@ int br_multicast_list_adjacent(struct net_device *dev,
struct list_head *br_ip_list);
bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto);
bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto);
+bool br_multicast_has_router_adjacent(struct net_device *dev, int proto);
bool br_multicast_enabled(const struct net_device *dev);
bool br_multicast_router(const struct net_device *dev);
int br_mdb_replay(struct net_device *br_dev, struct net_device *dev,
@@ -87,6 +88,13 @@ static inline bool br_multicast_has_querier_adjacent(struct net_device *dev,
{
return false;
}
+
+static inline bool br_multicast_has_router_adjacent(struct net_device *dev,
+ int proto)
+{
+ return true;
+}
+
static inline bool br_multicast_enabled(const struct net_device *dev)
{
return false;
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index f234c48036c8..0703725527b3 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -4054,6 +4054,61 @@ unlock:
}
EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent);
+/**
+ * br_multicast_has_router_adjacent - Checks for a router behind a bridge port
+ * @dev: The bridge port adjacent to which to check for a multicast router
+ * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
+ *
+ * Checks whether the given interface has a bridge on top and if so returns
+ * true if a multicast router is behind one of the other ports of this
+ * bridge. Otherwise returns false.
+ */
+bool br_multicast_has_router_adjacent(struct net_device *dev, int proto)
+{
+ struct net_bridge_port *port, *p;
+ bool ret = false;
+
+ rcu_read_lock();
+ port = br_port_get_check_rcu(dev);
+ if (!port)
+ goto unlock;
+
+ switch (proto) {
+ case ETH_P_IP:
+ hlist_for_each_entry_rcu(p, &port->br->ip4_mc_router_list,
+ ip4_rlist) {
+ if (p == port)
+ continue;
+
+ ret = true;
+ goto unlock;
+ }
+ break;
+#if IS_ENABLED(CONFIG_IPV6)
+ case ETH_P_IPV6:
+ hlist_for_each_entry_rcu(p, &port->br->ip6_mc_router_list,
+ ip6_rlist) {
+ if (p == port)
+ continue;
+
+ ret = true;
+ goto unlock;
+ }
+ break;
+#endif
+ default:
+ /* when compiled without IPv6 support, be conservative and
+ * always assume presence of an IPv6 multicast router
+ */
+ ret = true;
+ }
+
+unlock:
+ rcu_read_unlock();
+ return ret;
+}
+EXPORT_SYMBOL_GPL(br_multicast_has_router_adjacent);
+
static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats,
const struct sk_buff *skb, u8 type, u8 dir)
{