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bridge: Add br_fdb_clear_offload() 

When a driver unoffloads all FDB entries en bloc, it's inefficient to
send the switchdev notification one by one. Add a helper that unsets the
offload flag on FDB entries on a given bridge port and VLAN.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata 2018-12-07 19:55:07 +00:00 committed by David S. Miller
parent e5ff4b1952
commit 43920edf3b
2 changed files with 26 additions and 0 deletions
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6
include/linux/if_bridge.h
View File

@ -119,6 +119,7 @@ static inline int br_vlan_get_info(const struct net_device *dev, u16 vid,
struct net_device *br_fdb_find_port(const struct net_device *br_dev,
const unsigned char *addr,
__u16 vid);
void br_fdb_clear_offload(const struct net_device *dev, u16 vid);
bool br_port_flag_is_set(const struct net_device *dev, unsigned long flag);
#else
static inline struct net_device *
@ -128,6 +129,11 @@ br_fdb_find_port(const struct net_device *br_dev,
{
return NULL;
}
static inline void br_fdb_clear_offload(const struct net_device *dev, u16 vid)
{
}
static inline bool
br_port_flag_is_set(const struct net_device *dev, unsigned long flag)
{

20
net/bridge/br_fdb.c
View File

@ -1164,3 +1164,23 @@ void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
spin_unlock_bh(&br->hash_lock);
}
void br_fdb_clear_offload(const struct net_device *dev, u16 vid)
{
struct net_bridge_fdb_entry *f;
struct net_bridge_port *p;
ASSERT_RTNL();
p = br_port_get_rtnl(dev);
if (!p)
return;
spin_lock_bh(&p->br->hash_lock);
hlist_for_each_entry(f, &p->br->fdb_list, fdb_node) {
if (f->dst == p && f->key.vlan_id == vid)
f->offloaded = 0;
}
spin_unlock_bh(&p->br->hash_lock);
}
EXPORT_SYMBOL_GPL(br_fdb_clear_offload);