batman-adv: remove bonding and interface alternating
Remove bonding and interface alternating code - it will be replaced by a new, network-wide multi interface optimization which enables both bonding and interface alternating in a better way. Keep the sysfs and find router function though, this will be needed later. Signed-off-by: Simon Wunderlich <simon@open-mesh.com> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
This commit is contained in:
Simon Wunderlich
Antonio Quartulli
Родитель
f9577a376e
Коммит
f6c8b71173
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@ -974,8 +974,6 @@ batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv,
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neigh_node->last_ttl = batadv_ogm_packet->ttl;
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}
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batadv_bonding_candidate_add(bat_priv, orig_node, neigh_node);
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/* if this neighbor already is our next hop there is nothing
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* to change
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*/
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@ -1424,9 +1422,6 @@ static void batadv_iv_ogm_process(const struct ethhdr *ethhdr,
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is_bidirect = batadv_iv_ogm_calc_tq(orig_node, orig_neigh_node,
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batadv_ogm_packet, if_incoming);
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batadv_bonding_save_primary(orig_node, orig_neigh_node,
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batadv_ogm_packet);
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/* update ranking if it is not a duplicate or has the same
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* seqno and similar ttl as the non-duplicate
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*/
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@ -196,8 +196,6 @@ batadv_neigh_node_new(struct batadv_hard_iface *hard_iface,
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neigh_node->if_incoming = hard_iface;
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neigh_node->orig_node = orig_node;
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INIT_LIST_HEAD(&neigh_node->bonding_list);
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/* extra reference for return */
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atomic_set(&neigh_node->refcount, 2);
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@ -208,20 +206,13 @@ out:
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static void batadv_orig_node_free_rcu(struct rcu_head *rcu)
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{
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struct hlist_node *node_tmp;
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struct batadv_neigh_node *neigh_node, *tmp_neigh_node;
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struct batadv_neigh_node *neigh_node;
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struct batadv_orig_node *orig_node;
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orig_node = container_of(rcu, struct batadv_orig_node, rcu);
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spin_lock_bh(&orig_node->neigh_list_lock);
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/* for all bonding members ... */
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list_for_each_entry_safe(neigh_node, tmp_neigh_node,
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&orig_node->bond_list, bonding_list) {
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list_del_rcu(&neigh_node->bonding_list);
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batadv_neigh_node_free_ref(neigh_node);
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}
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/* for all neighbors towards this originator ... */
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hlist_for_each_entry_safe(neigh_node, node_tmp,
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&orig_node->neigh_list, list) {
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@ -325,7 +316,6 @@ struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv,
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return NULL;
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INIT_HLIST_HEAD(&orig_node->neigh_list);
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INIT_LIST_HEAD(&orig_node->bond_list);
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INIT_LIST_HEAD(&orig_node->vlan_list);
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spin_lock_init(&orig_node->bcast_seqno_lock);
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spin_lock_init(&orig_node->neigh_list_lock);
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@ -350,8 +340,6 @@ struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv,
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orig_node->bcast_seqno_reset = reset_time;
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orig_node->batman_seqno_reset = reset_time;
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atomic_set(&orig_node->bond_candidates, 0);
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/* create a vlan object for the "untagged" LAN */
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vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS);
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if (!vlan)
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@ -416,7 +404,6 @@ batadv_purge_orig_neighbors(struct batadv_priv *bat_priv,
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neigh_purged = true;
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hlist_del_rcu(&neigh_node->list);
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batadv_bonding_candidate_del(orig_node, neigh_node);
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batadv_neigh_node_free_ref(neigh_node);
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} else {
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/* store the best_neighbour if this is the first
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@ -96,115 +96,6 @@ out:
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batadv_neigh_node_free_ref(router);
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}
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/* caller must hold the neigh_list_lock */
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void batadv_bonding_candidate_del(struct batadv_orig_node *orig_node,
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struct batadv_neigh_node *neigh_node)
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{
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/* this neighbor is not part of our candidate list */
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if (list_empty(&neigh_node->bonding_list))
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goto out;
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list_del_rcu(&neigh_node->bonding_list);
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INIT_LIST_HEAD(&neigh_node->bonding_list);
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batadv_neigh_node_free_ref(neigh_node);
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atomic_dec(&orig_node->bond_candidates);
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out:
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return;
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}
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/**
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* batadv_bonding_candidate_add - consider a new link for bonding mode towards
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* the given originator
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* @bat_priv: the bat priv with all the soft interface information
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* @orig_node: the target node
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* @neigh_node: the neighbor representing the new link to consider for bonding
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* mode
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*/
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void batadv_bonding_candidate_add(struct batadv_priv *bat_priv,
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struct batadv_orig_node *orig_node,
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struct batadv_neigh_node *neigh_node)
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{
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struct batadv_algo_ops *bao = bat_priv->bat_algo_ops;
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struct batadv_neigh_node *tmp_neigh_node, *router = NULL;
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uint8_t interference_candidate = 0;
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spin_lock_bh(&orig_node->neigh_list_lock);
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/* only consider if it has the same primary address ... */
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if (!batadv_compare_eth(orig_node->orig,
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neigh_node->orig_node->primary_addr))
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goto candidate_del;
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router = batadv_orig_node_get_router(orig_node);
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if (!router)
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goto candidate_del;
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/* ... and is good enough to be considered */
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if (bao->bat_neigh_is_equiv_or_better(neigh_node, router))
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goto candidate_del;
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/* check if we have another candidate with the same mac address or
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* interface. If we do, we won't select this candidate because of
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* possible interference.
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*/
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hlist_for_each_entry_rcu(tmp_neigh_node,
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&orig_node->neigh_list, list) {
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if (tmp_neigh_node == neigh_node)
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continue;
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/* we only care if the other candidate is even
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* considered as candidate.
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*/
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if (list_empty(&tmp_neigh_node->bonding_list))
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continue;
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if ((neigh_node->if_incoming == tmp_neigh_node->if_incoming) ||
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(batadv_compare_eth(neigh_node->addr,
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tmp_neigh_node->addr))) {
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interference_candidate = 1;
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break;
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}
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}
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/* don't care further if it is an interference candidate */
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if (interference_candidate)
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goto candidate_del;
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/* this neighbor already is part of our candidate list */
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if (!list_empty(&neigh_node->bonding_list))
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goto out;
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if (!atomic_inc_not_zero(&neigh_node->refcount))
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goto out;
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list_add_rcu(&neigh_node->bonding_list, &orig_node->bond_list);
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atomic_inc(&orig_node->bond_candidates);
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goto out;
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candidate_del:
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batadv_bonding_candidate_del(orig_node, neigh_node);
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out:
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spin_unlock_bh(&orig_node->neigh_list_lock);
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if (router)
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batadv_neigh_node_free_ref(router);
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}
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/* copy primary address for bonding */
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void
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batadv_bonding_save_primary(const struct batadv_orig_node *orig_node,
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struct batadv_orig_node *orig_neigh_node,
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const struct batadv_ogm_packet *batman_ogm_packet)
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{
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if (!(batman_ogm_packet->flags & BATADV_PRIMARIES_FIRST_HOP))
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return;
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memcpy(orig_neigh_node->primary_addr, orig_node->orig, ETH_ALEN);
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}
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/* checks whether the host restarted and is in the protection time.
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* returns:
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* 0 if the packet is to be accepted
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@ -459,114 +350,6 @@ out:
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return ret;
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}
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/* In the bonding case, send the packets in a round
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* robin fashion over the remaining interfaces.
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*
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* This method rotates the bonding list and increases the
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* returned router's refcount.
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*/
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static struct batadv_neigh_node *
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batadv_find_bond_router(struct batadv_orig_node *primary_orig,
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const struct batadv_hard_iface *recv_if)
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{
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struct batadv_neigh_node *tmp_neigh_node;
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struct batadv_neigh_node *router = NULL, *first_candidate = NULL;
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rcu_read_lock();
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list_for_each_entry_rcu(tmp_neigh_node, &primary_orig->bond_list,
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bonding_list) {
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if (!first_candidate)
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first_candidate = tmp_neigh_node;
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/* recv_if == NULL on the first node. */
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if (tmp_neigh_node->if_incoming == recv_if)
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continue;
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if (!atomic_inc_not_zero(&tmp_neigh_node->refcount))
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continue;
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router = tmp_neigh_node;
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break;
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}
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/* use the first candidate if nothing was found. */
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if (!router && first_candidate &&
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atomic_inc_not_zero(&first_candidate->refcount))
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router = first_candidate;
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if (!router)
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goto out;
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/* selected should point to the next element
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* after the current router
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*/
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spin_lock_bh(&primary_orig->neigh_list_lock);
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/* this is a list_move(), which unfortunately
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* does not exist as rcu version
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*/
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list_del_rcu(&primary_orig->bond_list);
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list_add_rcu(&primary_orig->bond_list,
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&router->bonding_list);
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spin_unlock_bh(&primary_orig->neigh_list_lock);
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out:
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rcu_read_unlock();
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return router;
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}
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/**
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* batadv_find_ifalter_router - find the best of the remaining candidates which
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* are not using this interface
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* @bat_priv: the bat priv with all the soft interface information
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* @primary_orig: the destination
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* @recv_if: the interface that the router returned by this function has to not
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* use
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*
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* Returns the best candidate towards primary_orig that is not using recv_if.
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* Increases the returned neighbor's refcount
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*/
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static struct batadv_neigh_node *
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batadv_find_ifalter_router(struct batadv_priv *bat_priv,
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struct batadv_orig_node *primary_orig,
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const struct batadv_hard_iface *recv_if)
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{
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struct batadv_neigh_node *router = NULL, *first_candidate = NULL;
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struct batadv_algo_ops *bao = bat_priv->bat_algo_ops;
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struct batadv_neigh_node *tmp_neigh_node;
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rcu_read_lock();
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list_for_each_entry_rcu(tmp_neigh_node, &primary_orig->bond_list,
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bonding_list) {
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if (!first_candidate)
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first_candidate = tmp_neigh_node;
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/* recv_if == NULL on the first node. */
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if (tmp_neigh_node->if_incoming == recv_if)
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continue;
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if (router && bao->bat_neigh_cmp(tmp_neigh_node, router))
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continue;
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if (!atomic_inc_not_zero(&tmp_neigh_node->refcount))
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continue;
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/* decrement refcount of previously selected router */
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if (router)
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batadv_neigh_node_free_ref(router);
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/* we found a better router (or at least one valid router) */
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router = tmp_neigh_node;
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}
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/* use the first candidate if nothing was found. */
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if (!router && first_candidate &&
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atomic_inc_not_zero(&first_candidate->refcount))
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router = first_candidate;
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rcu_read_unlock();
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return router;
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}
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/**
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* batadv_check_unicast_packet - Check for malformed unicast packets
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* @bat_priv: the bat priv with all the soft interface information
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@ -604,95 +387,30 @@ static int batadv_check_unicast_packet(struct batadv_priv *bat_priv,
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return 0;
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}
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/* find a suitable router for this originator, and use
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* bonding if possible. increases the found neighbors
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* refcount.
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/**
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* batadv_find_router - find a suitable router for this originator
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* @bat_priv: the bat priv with all the soft interface information
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* @orig_node: the destination node
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* @recv_if: pointer to interface this packet was received on
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*
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* Returns the router which should be used for this orig_node on
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* this interface, or NULL if not available.
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*/
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struct batadv_neigh_node *
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batadv_find_router(struct batadv_priv *bat_priv,
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struct batadv_orig_node *orig_node,
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const struct batadv_hard_iface *recv_if)
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{
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struct batadv_orig_node *primary_orig_node;
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struct batadv_orig_node *router_orig;
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struct batadv_neigh_node *router;
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static uint8_t zero_mac[ETH_ALEN] = {0, 0, 0, 0, 0, 0};
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int bonding_enabled;
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uint8_t *primary_addr;
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if (!orig_node)
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return NULL;
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router = batadv_orig_node_get_router(orig_node);
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if (!router)
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goto err;
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/* without bonding, the first node should
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* always choose the default router.
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*/
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bonding_enabled = atomic_read(&bat_priv->bonding);
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/* TODO: fill this later with new bonding mechanism */
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rcu_read_lock();
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/* select default router to output */
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router_orig = router->orig_node;
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if (!router_orig)
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goto err_unlock;
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if ((!recv_if) && (!bonding_enabled))
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goto return_router;
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primary_addr = router_orig->primary_addr;
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/* if we have something in the primary_addr, we can search
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* for a potential bonding candidate.
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*/
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if (batadv_compare_eth(primary_addr, zero_mac))
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goto return_router;
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/* find the orig_node which has the primary interface. might
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* even be the same as our router_orig in many cases
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*/
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if (batadv_compare_eth(primary_addr, router_orig->orig)) {
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primary_orig_node = router_orig;
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} else {
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primary_orig_node = batadv_orig_hash_find(bat_priv,
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primary_addr);
|
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if (!primary_orig_node)
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goto return_router;
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batadv_orig_node_free_ref(primary_orig_node);
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}
|
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/* with less than 2 candidates, we can't do any
|
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* bonding and prefer the original router.
|
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*/
|
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if (atomic_read(&primary_orig_node->bond_candidates) < 2)
|
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goto return_router;
|
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|
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/* all nodes between should choose a candidate which
|
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* is is not on the interface where the packet came
|
||||
* in.
|
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*/
|
||||
batadv_neigh_node_free_ref(router);
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|
||||
if (bonding_enabled)
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router = batadv_find_bond_router(primary_orig_node, recv_if);
|
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else
|
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router = batadv_find_ifalter_router(bat_priv, primary_orig_node,
|
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recv_if);
|
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|
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return_router:
|
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if (router && router->if_incoming->if_status != BATADV_IF_ACTIVE)
|
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goto err_unlock;
|
||||
|
||||
rcu_read_unlock();
|
||||
return router;
|
||||
err_unlock:
|
||||
rcu_read_unlock();
|
||||
err:
|
||||
if (router)
|
||||
batadv_neigh_node_free_ref(router);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static int batadv_route_unicast_packet(struct sk_buff *skb,
|
||||
|
|
|
|||
|
|
@ -44,15 +44,6 @@ struct batadv_neigh_node *
|
|||
batadv_find_router(struct batadv_priv *bat_priv,
|
||||
struct batadv_orig_node *orig_node,
|
||||
const struct batadv_hard_iface *recv_if);
|
||||
void batadv_bonding_candidate_del(struct batadv_orig_node *orig_node,
|
||||
struct batadv_neigh_node *neigh_node);
|
||||
void batadv_bonding_candidate_add(struct batadv_priv *bat_priv,
|
||||
struct batadv_orig_node *orig_node,
|
||||
struct batadv_neigh_node *neigh_node);
|
||||
void batadv_bonding_save_primary(const struct batadv_orig_node *orig_node,
|
||||
struct batadv_orig_node *orig_neigh_node,
|
||||
const struct batadv_ogm_packet
|
||||
*batman_ogm_packet);
|
||||
int batadv_window_protected(struct batadv_priv *bat_priv, int32_t seq_num_diff,
|
||||
unsigned long *last_reset);
|
||||
|
||||
|
|
|
|||
|
|
@ -199,12 +199,10 @@ struct batadv_orig_bat_iv {
|
|||
* last_bcast_seqno)
|
||||
* @last_bcast_seqno: last broadcast sequence number received by this host
|
||||
* @neigh_list: list of potential next hop neighbor towards this orig node
|
||||
* @neigh_list_lock: lock protecting neigh_list, router and bonding_list
|
||||
* @neigh_list_lock: lock protecting neigh_list and router
|
||||
* @hash_entry: hlist node for batadv_priv::orig_hash
|
||||
* @bat_priv: pointer to soft_iface this orig node belongs to
|
||||
* @bcast_seqno_lock: lock protecting bcast_bits & last_bcast_seqno
|
||||
* @bond_candidates: how many candidates are available
|
||||
* @bond_list: list of bonding candidates
|
||||
* @refcount: number of contexts the object is used
|
||||
* @rcu: struct used for freeing in an RCU-safe manner
|
||||
* @in_coding_list: list of nodes this orig can hear
|
||||
|
|
@ -240,14 +238,12 @@ struct batadv_orig_node {
|
|||
DECLARE_BITMAP(bcast_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
|
||||
uint32_t last_bcast_seqno;
|
||||
struct hlist_head neigh_list;
|
||||
/* neigh_list_lock protects: neigh_list, router & bonding_list */
|
||||
/* neigh_list_lock protects: neigh_list and router */
|
||||
spinlock_t neigh_list_lock;
|
||||
struct hlist_node hash_entry;
|
||||
struct batadv_priv *bat_priv;
|
||||
/* bcast_seqno_lock protects: bcast_bits & last_bcast_seqno */
|
||||
spinlock_t bcast_seqno_lock;
|
||||
atomic_t bond_candidates;
|
||||
struct list_head bond_list;
|
||||
atomic_t refcount;
|
||||
struct rcu_head rcu;
|
||||
#ifdef CONFIG_BATMAN_ADV_NC
|
||||
|
|
@ -320,7 +316,6 @@ struct batadv_neigh_bat_iv {
|
|||
* @if_incoming: pointer to incoming hard interface
|
||||
* @last_seen: when last packet via this neighbor was received
|
||||
* @last_ttl: last received ttl from this neigh node
|
||||
* @bonding_list: list node for batadv_orig_node::bond_list
|
||||
* @refcount: number of contexts the object is used
|
||||
* @rcu: struct used for freeing in an RCU-safe manner
|
||||
* @bat_iv: B.A.T.M.A.N. IV private structure
|
||||
|
|
@ -332,7 +327,6 @@ struct batadv_neigh_node {
|
|||
struct batadv_hard_iface *if_incoming;
|
||||
unsigned long last_seen;
|
||||
uint8_t last_ttl;
|
||||
struct list_head bonding_list;
|
||||
atomic_t refcount;
|
||||
struct rcu_head rcu;
|
||||
struct batadv_neigh_bat_iv bat_iv;
|
||||
|
|
|
|||
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