vxlan: allow removal of single destination from fdb entry
When the last item is deleted from the remote destinations list, the fdb entry is destroyed. Signed-off-by: Mike Rapoport <mike.rapoport@ravellosystems.com> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
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f0b074be7b
commit
bc7892ba39
1 changed files with 40 additions and 4 deletions
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@ -105,6 +105,7 @@ struct vxlan_rdst {
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u32 remote_vni;
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u32 remote_vni;
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u32 remote_ifindex;
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u32 remote_ifindex;
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struct list_head list;
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struct list_head list;
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struct rcu_head rcu;
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};
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};
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/* Forwarding table entry */
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/* Forwarding table entry */
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@ -496,6 +497,12 @@ static int vxlan_fdb_create(struct vxlan_dev *vxlan,
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return 0;
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return 0;
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}
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}
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static void vxlan_fdb_free_rdst(struct rcu_head *head)
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{
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struct vxlan_rdst *rd = container_of(head, struct vxlan_rdst, rcu);
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kfree(rd);
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}
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static void vxlan_fdb_free(struct rcu_head *head)
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static void vxlan_fdb_free(struct rcu_head *head)
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{
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{
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struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu);
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struct vxlan_fdb *f = container_of(head, struct vxlan_fdb, rcu);
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@ -605,14 +612,43 @@ static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
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{
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{
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struct vxlan_dev *vxlan = netdev_priv(dev);
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struct vxlan_dev *vxlan = netdev_priv(dev);
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struct vxlan_fdb *f;
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struct vxlan_fdb *f;
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int err = -ENOENT;
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struct vxlan_rdst *rd = NULL;
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__be32 ip;
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__be16 port;
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u32 vni, ifindex;
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int err;
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err = vxlan_fdb_parse(tb, vxlan, &ip, &port, &vni, &ifindex);
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if (err)
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return err;
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err = -ENOENT;
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spin_lock_bh(&vxlan->hash_lock);
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spin_lock_bh(&vxlan->hash_lock);
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f = vxlan_find_mac(vxlan, addr);
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f = vxlan_find_mac(vxlan, addr);
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if (f) {
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if (!f)
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vxlan_fdb_destroy(vxlan, f);
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goto out;
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err = 0;
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if (ip != htonl(INADDR_ANY)) {
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rd = vxlan_fdb_find_rdst(f, ip, port, vni, ifindex);
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if (!rd)
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goto out;
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}
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}
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err = 0;
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/* remove a destination if it's not the only one on the list,
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* otherwise destroy the fdb entry
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*/
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if (rd && !list_is_singular(&f->remotes)) {
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list_del_rcu(&rd->list);
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call_rcu(&rd->rcu, vxlan_fdb_free_rdst);
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goto out;
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}
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vxlan_fdb_destroy(vxlan, f);
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out:
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spin_unlock_bh(&vxlan->hash_lock);
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spin_unlock_bh(&vxlan->hash_lock);
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return err;
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return err;
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