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vxlan: Add vxlan_fdb_replay()

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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: Petr Machata <petrm@mellanox.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 19:55:04 +00:00 committed by David S. Miller
parent ff23b91ce1
commit 4f89f5b535
2 changed files with 56 additions and 0 deletions
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47
drivers/net/vxlan.c
View File

@ -552,6 +552,53 @@ out:
}
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,

9
include/net/vxlan.h
View File

@ -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