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vxlan: Add vxlan_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 walks the
FDB table, unsetting the offload flag on RDST with a given VNI.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Petr Machata 2018-12-07 19:55:06 +00:00 committed by David S. Miller
parent 4f89f5b535
commit e5ff4b1952
2 changed files with 28 additions and 0 deletions
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22
drivers/net/vxlan.c
View File

@ -599,6 +599,28 @@ out:
}
EXPORT_SYMBOL_GPL(vxlan_fdb_replay);
void vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni)
{
struct vxlan_dev *vxlan;
struct vxlan_rdst *rdst;
struct vxlan_fdb *f;
unsigned int h;
if (!netif_is_vxlan(dev))
return;
vxlan = netdev_priv(dev);
spin_lock_bh(&vxlan->hash_lock);
for (h = 0; h < FDB_HASH_SIZE; ++h) {
hlist_for_each_entry(f, &vxlan->fdb_head[h], hlist)
if (f->vni == vni)
list_for_each_entry(rdst, &f->remotes, list)
rdst->offloaded = false;
}
spin_unlock_bh(&vxlan->hash_lock);
}
EXPORT_SYMBOL_GPL(vxlan_fdb_clear_offload);
/* Replace destination of unicast mac */
static int vxlan_fdb_replace(struct vxlan_fdb *f,
union vxlan_addr *ip, __be16 port, __be32 vni,

6
include/net/vxlan.h
View File

@ -429,6 +429,7 @@ int vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni,
struct switchdev_notifier_vxlan_fdb_info *fdb_info);
int vxlan_fdb_replay(const struct net_device *dev, __be32 vni,
struct notifier_block *nb);
void vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni);
#else
static inline int
@ -443,6 +444,11 @@ static inline int vxlan_fdb_replay(const struct net_device *dev, __be32 vni,
{
return -EOPNOTSUPP;
}
static inline void
vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni)
{
}
#endif
#endif