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vxlan: vxlan_core: Make vxlan_flush() more generic for future use

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The function vxlan_flush() gets a boolean called 'do_all' and in case
that it is false, it does not flush entries with state 'NUD_PERMANENT'
or 'NUD_NOARP'. The following patches will add support for FDB flush
with parameters from user space. Make the function more generic, so it
can be used later.

Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Amit Cohen
2023-10-09 13:06:09 +03:00
committed by David S. Miller
parent 38985e8c27
commit bfe36bf781
1 changed files with 26 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/net/vxlan/vxlan_core.c
+26 -4
View File
@@ -3022,8 +3022,23 @@ static int vxlan_open(struct net_device *dev)
return ret;
}
struct vxlan_fdb_flush_desc {
unsigned long state;
unsigned long state_mask;
};
static bool vxlan_fdb_flush_matches(const struct vxlan_fdb *f,
const struct vxlan_fdb_flush_desc *desc)
{
if (desc->state_mask && (f->state & desc->state_mask) != desc->state)
return false;
return true;
}
/* Purge the forwarding table */
static void vxlan_flush(struct vxlan_dev *vxlan, bool do_all)
static void vxlan_flush(struct vxlan_dev *vxlan,
const struct vxlan_fdb_flush_desc *desc)
{
unsigned int h;
@@ -3034,8 +3049,10 @@ static void vxlan_flush(struct vxlan_dev *vxlan, bool do_all)
hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
struct vxlan_fdb *f
= container_of(p, struct vxlan_fdb, hlist);
if (!do_all && (f->state & (NUD_PERMANENT | NUD_NOARP)))
if (!vxlan_fdb_flush_matches(f, desc))
continue;
/* the all_zeros_mac entry is deleted at vxlan_uninit */
if (is_zero_ether_addr(f->eth_addr) &&
f->vni == vxlan->cfg.vni)
@@ -3050,12 +3067,16 @@ static void vxlan_flush(struct vxlan_dev *vxlan, bool do_all)
static int vxlan_stop(struct net_device *dev)
{
struct vxlan_dev *vxlan = netdev_priv(dev);
struct vxlan_fdb_flush_desc desc = {
.state = 0,
.state_mask = NUD_PERMANENT | NUD_NOARP,
};
vxlan_multicast_leave(vxlan);
del_timer_sync(&vxlan->age_timer);
vxlan_flush(vxlan, false);
vxlan_flush(vxlan, &desc);
vxlan_sock_release(vxlan);
return 0;
@@ -4294,8 +4315,9 @@ static int vxlan_changelink(struct net_device *dev, struct nlattr *tb[],
static void vxlan_dellink(struct net_device *dev, struct list_head *head)
{
struct vxlan_dev *vxlan = netdev_priv(dev);
struct vxlan_fdb_flush_desc desc = {};
vxlan_flush(vxlan, true);
vxlan_flush(vxlan, &desc);
list_del(&vxlan->next);
unregister_netdevice_queue(dev, head);