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Commit 4f89f5b5 authored by Petr Machata's avatar Petr Machata Committed by David S. Miller
Browse files

vxlan: Add vxlan_fdb_replay() 



When a VXLAN device becomes relevant to a driver (such as when it is
attached to an offloaded bridge), the driver will generally need to walk
the existing FDB entries and offload them.

Add a function vxlan_fdb_replay() to call a given notifier block for
each FDB entry with a given VNI.

Signed-off-by: default avatarPetr Machata <petrm@mellanox.com>
Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ff23b91c

drivers/net/vxlan.c

+47 −0
Original line number Diff line number Diff line
@@ -552,6 +552,53 @@ int vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni, 
}

EXPORT_SYMBOL_GPL(vxlan_fdb_find_uc);



static int vxlan_fdb_notify_one(struct notifier_block *nb,

				const struct vxlan_dev *vxlan,

				const struct vxlan_fdb *f,

				const struct vxlan_rdst *rdst)

{

	struct switchdev_notifier_vxlan_fdb_info fdb_info;

	int rc;



	vxlan_fdb_switchdev_notifier_info(vxlan, f, rdst, &fdb_info);

	rc = nb->notifier_call(nb, SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE,

			       &fdb_info);

	return notifier_to_errno(rc);

}



int vxlan_fdb_replay(const struct net_device *dev, __be32 vni,

		     struct notifier_block *nb)

{

	struct vxlan_dev *vxlan;

	struct vxlan_rdst *rdst;

	struct vxlan_fdb *f;

	unsigned int h;

	int rc = 0;



	if (!netif_is_vxlan(dev))

		return -EINVAL;

	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) {

					rc = vxlan_fdb_notify_one(nb, vxlan,

								  f, rdst);

					if (rc)

						goto out;

				}

			}

		}

	}



out:

	spin_unlock_bh(&vxlan->hash_lock);

	return rc;

}

EXPORT_SYMBOL_GPL(vxlan_fdb_replay);



/* Replace destination of unicast mac */

static int vxlan_fdb_replace(struct vxlan_fdb *f,

			     union vxlan_addr *ip, __be16 port, __be32 vni,

include/net/vxlan.h

+9 −0
Original line number Diff line number Diff line
@@ -427,6 +427,9 @@ struct switchdev_notifier_vxlan_fdb_info { 
#if IS_ENABLED(CONFIG_VXLAN)

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);



#else

static inline int

vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni,
@@ -434,6 +437,12 @@ vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni, 
{

	return -ENOENT;

}



static inline int vxlan_fdb_replay(const struct net_device *dev, __be32 vni,

				   struct notifier_block *nb)

{

	return -EOPNOTSUPP;

}

#endif



#endif