[net-next v2 09/11] bridge: cfm: Bridge port remove.

From: Henrik Bjoernlund
Date: Thu Oct 01 2020 - 06:33:15 EST


This is addition of CFM functionality to delete MEP instances
on a port that is removed from the bridge.
A MEP can only exist on a port that is related to a bridge.

Reviewed-by: Horatiu Vultur <horatiu.vultur@xxxxxxxxxxxxx>
Signed-off-by: Henrik Bjoernlund <henrik.bjoernlund@xxxxxxxxxxxxx>m
---
net/bridge/br_cfm.c | 13 +++++++++++++
net/bridge/br_if.c | 1 +
net/bridge/br_private.h | 6 ++++++
3 files changed, 20 insertions(+)

diff --git a/net/bridge/br_cfm.c b/net/bridge/br_cfm.c
index 6fbfef44c235..fc8268cb76c1 100644
--- a/net/bridge/br_cfm.c
+++ b/net/bridge/br_cfm.c
@@ -867,3 +867,16 @@ bool br_cfm_created(struct net_bridge *br)
{
return !hlist_empty(&br->mep_list);
}
+
+/* Deletes the CFM instances on a specific bridge port
+ */
+void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *port)
+{
+ struct br_cfm_mep *mep;
+
+ ASSERT_RTNL();
+
+ hlist_for_each_entry(mep, &br->mep_list, head)
+ if (mep->create.ifindex == port->dev->ifindex)
+ mep_delete_implementation(br, mep);
+}
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index a0e9a7937412..f7d2f472ae24 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -334,6 +334,7 @@ static void del_nbp(struct net_bridge_port *p)
spin_unlock_bh(&br->lock);

br_mrp_port_del(br, p);
+ br_cfm_port_del(br, p);

br_ifinfo_notify(RTM_DELLINK, NULL, p);

diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 5954ee45af80..735dd0028b40 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -1465,6 +1465,7 @@ static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
bool br_cfm_created(struct net_bridge *br);
+void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br);
int br_cfm_status_fill_info(struct sk_buff *skb,
struct net_bridge *br,
@@ -1484,6 +1485,11 @@ static inline bool br_cfm_created(struct net_bridge *br)
return false;
}

+static inline void br_cfm_port_del(struct net_bridge *br,
+ struct net_bridge_port *p)
+{
+}
+
static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br)
{
return -EOPNOTSUPP;
--
2.28.0