diff options
Diffstat (limited to 'drivers/net/vxlan.c')
| -rw-r--r-- | drivers/net/vxlan.c | 44 |
1 files changed, 40 insertions, 4 deletions
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index ee7cc71e57fd..c1825201f9e2 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -105,6 +105,7 @@ struct vxlan_rdst { u32 remote_vni; u32 remote_ifindex; struct list_head list; + struct rcu_head rcu; }; /* Forwarding table entry */ @@ -496,6 +497,12 @@ static int vxlan_fdb_create(struct vxlan_dev *vxlan, return 0; } +static void vxlan_fdb_free_rdst(struct rcu_head *head) +{ + struct vxlan_rdst *rd = container_of(head, struct vxlan_rdst, rcu); + kfree(rd); +} + static void vxlan_fdb_free(struct rcu_head *head) { struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu); @@ -605,14 +612,43 @@ static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], { struct vxlan_dev *vxlan = netdev_priv(dev); struct vxlan_fdb *f; - int err = -ENOENT; + struct vxlan_rdst *rd = NULL; + __be32 ip; + __be16 port; + u32 vni, ifindex; + int err; + + err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex); + if (err) + return err; + + err = -ENOENT; spin_lock_bh(&vxlan->hash_lock); f = vxlan_find_mac(vxlan, addr); - if (f) { - vxlan_fdb_destroy(vxlan, f); - err = 0; + if (!f) + goto out; + + if (ip != htonl(INADDR_ANY)) { + rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex); + if (!rd) + goto out; + } + + err = 0; + + /* remove a destination if it's not the only one on the list, + * otherwise destroy the fdb entry + */ + if (rd && !list_is_singular(&f->remotes)) { + list_del_rcu(&rd->list); + call_rcu(&rd->rcu, vxlan_fdb_free_rdst); + goto out; } + + vxlan_fdb_destroy(vxlan, f); + +out: spin_unlock_bh(&vxlan->hash_lock); return err; |