1 files changed, 569 insertions, 431 deletions

diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index 8828eddd3f72..c172f5d0e05a 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ * Copyright (C) 2007-2011 B.A.T.M.A.N. contributors:
  *
  * Marek Lindner, Simon Wunderlich
  *
@@ -28,7 +28,6 @@
 #include "icmp_socket.h"
 #include "translation-table.h"
 #include "originator.h"
-#include "types.h"
 #include "ring_buffer.h"
 #include "vis.h"
 #include "aggregation.h"
@@ -36,35 +35,33 @@
 #include "gateway_client.h"
 #include "unicast.h"
 
-void slide_own_bcast_window(struct batman_if *batman_if)
+void slide_own_bcast_window(struct hard_iface *hard_iface)
 {
-        struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
+        struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
         struct hashtable_t *hash = bat_priv->orig_hash;
-        struct hlist_node *walk;
+        struct hlist_node *node;
         struct hlist_head *head;
-        struct element_t *bucket;
         struct orig_node *orig_node;
         unsigned long *word;
         int i;
         size_t word_index;
 
-        spin_lock_bh(&bat_priv->orig_hash_lock);
-
         for (i = 0; i < hash->size; i++) {
                 head = &hash->table[i];
 
-                hlist_for_each_entry(bucket, walk, head, hlist) {
-                        orig_node = bucket->data;
-                        word_index = batman_if->if_num * NUM_WORDS;
+                rcu_read_lock();
+                hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
+                        spin_lock_bh(&orig_node->ogm_cnt_lock);
+                        word_index = hard_iface->if_num * NUM_WORDS;
                         word = &(orig_node->bcast_own[word_index]);
 
                         bit_get_packet(bat_priv, word, 1, 0);
-                        orig_node->bcast_own_sum[batman_if->if_num] =
+                        orig_node->bcast_own_sum[hard_iface->if_num] =
                                 bit_packet_count(word);
+                        spin_unlock_bh(&orig_node->ogm_cnt_lock);
                 }
+                rcu_read_unlock();
         }
-
-        spin_unlock_bh(&bat_priv->orig_hash_lock);
 }
 
 static void update_HNA(struct bat_priv *bat_priv, struct orig_node *orig_node,
@@ -90,6 +87,8 @@ static void update_route(struct bat_priv *bat_priv,
                          struct neigh_node *neigh_node,
                          unsigned char *hna_buff, int hna_buff_len)
 {
+        struct neigh_node *neigh_node_tmp;
+
         /* route deleted */
         if ((orig_node->router) && (!neigh_node)) {
 
@@ -116,7 +115,12 @@ static void update_route(struct bat_priv *bat_priv,
                         orig_node->router->addr);
         }
 
+        if (neigh_node && !atomic_inc_not_zero(&neigh_node->refcount))
+                neigh_node = NULL;
+        neigh_node_tmp = orig_node->router;
         orig_node->router = neigh_node;
+        if (neigh_node_tmp)
+                neigh_node_free_ref(neigh_node_tmp);
 }
 
 
@@ -139,73 +143,93 @@ void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node,
 static int is_bidirectional_neigh(struct orig_node *orig_node,
                                 struct orig_node *orig_neigh_node,
                                 struct batman_packet *batman_packet,
-                                struct batman_if *if_incoming)
+                                struct hard_iface *if_incoming)
 {
         struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
-        struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
+        struct neigh_node *neigh_node = NULL, *tmp_neigh_node;
+        struct hlist_node *node;
         unsigned char total_count;
+        uint8_t orig_eq_count, neigh_rq_count, tq_own;
+        int tq_asym_penalty, ret = 0;
 
         if (orig_node == orig_neigh_node) {
-                list_for_each_entry(tmp_neigh_node,
-                                    &orig_node->neigh_list,
-                                    list) {
-
-                        if (compare_orig(tmp_neigh_node->addr,
-                                         orig_neigh_node->orig) &&
-                            (tmp_neigh_node->if_incoming == if_incoming))
-                                neigh_node = tmp_neigh_node;
+                rcu_read_lock();
+                hlist_for_each_entry_rcu(tmp_neigh_node, node,
+                                         &orig_node->neigh_list, list) {
+
+                        if (!compare_eth(tmp_neigh_node->addr,
+                                         orig_neigh_node->orig))
+                                continue;
+
+                        if (tmp_neigh_node->if_incoming != if_incoming)
+                                continue;
+
+                        if (!atomic_inc_not_zero(&tmp_neigh_node->refcount))
+                                continue;
+
+                        neigh_node = tmp_neigh_node;
                 }
+                rcu_read_unlock();
 
                 if (!neigh_node)
                         neigh_node = create_neighbor(orig_node,
                                                      orig_neigh_node,
                                                      orig_neigh_node->orig,
                                                      if_incoming);
-                /* create_neighbor failed, return 0 */
                 if (!neigh_node)
-                        return 0;
+                        goto out;
 
                 neigh_node->last_valid = jiffies;
         } else {
                 /* find packet count of corresponding one hop neighbor */
-                list_for_each_entry(tmp_neigh_node,
-                                    &orig_neigh_node->neigh_list, list) {
+                rcu_read_lock();
+                hlist_for_each_entry_rcu(tmp_neigh_node, node,
+                                         &orig_neigh_node->neigh_list, list) {
 
-                        if (compare_orig(tmp_neigh_node->addr,
-                                         orig_neigh_node->orig) &&
-                            (tmp_neigh_node->if_incoming == if_incoming))
-                                neigh_node = tmp_neigh_node;
+                        if (!compare_eth(tmp_neigh_node->addr,
+                                         orig_neigh_node->orig))
+                                continue;
+
+                        if (tmp_neigh_node->if_incoming != if_incoming)
+                                continue;
+
+                        if (!atomic_inc_not_zero(&tmp_neigh_node->refcount))
+                                continue;
+
+                        neigh_node = tmp_neigh_node;
                 }
+                rcu_read_unlock();
 
                 if (!neigh_node)
                         neigh_node = create_neighbor(orig_neigh_node,
                                                      orig_neigh_node,
                                                      orig_neigh_node->orig,
                                                      if_incoming);
-                /* create_neighbor failed, return 0 */
                 if (!neigh_node)
-                        return 0;
+                        goto out;
         }
 
         orig_node->last_valid = jiffies;
 
+        spin_lock_bh(&orig_node->ogm_cnt_lock);
+        orig_eq_count = orig_neigh_node->bcast_own_sum[if_incoming->if_num];
+        neigh_rq_count = neigh_node->real_packet_count;
+        spin_unlock_bh(&orig_node->ogm_cnt_lock);
+
         /* pay attention to not get a value bigger than 100 % */
-        total_count = (orig_neigh_node->bcast_own_sum[if_incoming->if_num] >
-                       neigh_node->real_packet_count ?
-                       neigh_node->real_packet_count :
-                       orig_neigh_node->bcast_own_sum[if_incoming->if_num]);
+        total_count = (orig_eq_count > neigh_rq_count ?
+                       neigh_rq_count : orig_eq_count);
 
         /* if we have too few packets (too less data) we set tq_own to zero */
         /* if we receive too few packets it is not considered bidirectional */
         if ((total_count < TQ_LOCAL_BIDRECT_SEND_MINIMUM) ||
-            (neigh_node->real_packet_count < TQ_LOCAL_BIDRECT_RECV_MINIMUM))
-                orig_neigh_node->tq_own = 0;
+            (neigh_rq_count < TQ_LOCAL_BIDRECT_RECV_MINIMUM))
+                tq_own = 0;
         else
                 /* neigh_node->real_packet_count is never zero as we
                  * only purge old information when getting new
                  * information */
-                orig_neigh_node->tq_own = (TQ_MAX_VALUE * total_count) /
-                        neigh_node->real_packet_count;
+                tq_own = (TQ_MAX_VALUE * total_count) / neigh_rq_count;
 
         /*
          * 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does
@@ -213,20 +237,16 @@ static int is_bidirectional_neigh(struct orig_node *orig_node,
          * punishes asymmetric links more.  This will give a value
          * between 0 and TQ_MAX_VALUE
          */
-        orig_neigh_node->tq_asym_penalty =
-                TQ_MAX_VALUE -
-                (TQ_MAX_VALUE *
-                 (TQ_LOCAL_WINDOW_SIZE - neigh_node->real_packet_count) *
-                 (TQ_LOCAL_WINDOW_SIZE - neigh_node->real_packet_count) *
-                 (TQ_LOCAL_WINDOW_SIZE - neigh_node->real_packet_count)) /
-                (TQ_LOCAL_WINDOW_SIZE *
-                 TQ_LOCAL_WINDOW_SIZE *
-                 TQ_LOCAL_WINDOW_SIZE);
-
-        batman_packet->tq = ((batman_packet->tq *
-                              orig_neigh_node->tq_own *
-                              orig_neigh_node->tq_asym_penalty) /
-                             (TQ_MAX_VALUE * TQ_MAX_VALUE));
+        tq_asym_penalty = TQ_MAX_VALUE - (TQ_MAX_VALUE *
+                                (TQ_LOCAL_WINDOW_SIZE - neigh_rq_count) *
+                                (TQ_LOCAL_WINDOW_SIZE - neigh_rq_count) *
+                                (TQ_LOCAL_WINDOW_SIZE - neigh_rq_count)) /
+                                        (TQ_LOCAL_WINDOW_SIZE *
+                                         TQ_LOCAL_WINDOW_SIZE *
+                                         TQ_LOCAL_WINDOW_SIZE);
+
+        batman_packet->tq = ((batman_packet->tq * tq_own * tq_asym_penalty) /
+                                                (TQ_MAX_VALUE * TQ_MAX_VALUE));
 
         bat_dbg(DBG_BATMAN, bat_priv,
                 "bidirectional: "
@@ -234,34 +254,141 @@ static int is_bidirectional_neigh(struct orig_node *orig_node,
                 "real recv = %2i, local tq: %3i, asym_penalty: %3i, "
                 "total tq: %3i\n",
                 orig_node->orig, orig_neigh_node->orig, total_count,
-                neigh_node->real_packet_count, orig_neigh_node->tq_own,
-                orig_neigh_node->tq_asym_penalty, batman_packet->tq);
+                neigh_rq_count, tq_own, tq_asym_penalty, batman_packet->tq);
 
         /* if link has the minimum required transmission quality
          * consider it bidirectional */
         if (batman_packet->tq >= TQ_TOTAL_BIDRECT_LIMIT)
-                return 1;
+                ret = 1;
 
-        return 0;
+out:
+        if (neigh_node)
+                neigh_node_free_ref(neigh_node);
+        return ret;
+}
+
+/* caller must hold the neigh_list_lock */
+void bonding_candidate_del(struct orig_node *orig_node,
+                           struct neigh_node *neigh_node)
+{
+        /* this neighbor is not part of our candidate list */
+        if (list_empty(&neigh_node->bonding_list))
+                goto out;
+
+        list_del_rcu(&neigh_node->bonding_list);
+        INIT_LIST_HEAD(&neigh_node->bonding_list);
+        neigh_node_free_ref(neigh_node);
+        atomic_dec(&orig_node->bond_candidates);
+
+out:
+        return;
+}
+
+static void bonding_candidate_add(struct orig_node *orig_node,
+                                  struct neigh_node *neigh_node)
+{
+        struct hlist_node *node;
+        struct neigh_node *tmp_neigh_node;
+        uint8_t best_tq, interference_candidate = 0;
+
+        spin_lock_bh(&orig_node->neigh_list_lock);
+
+        /* only consider if it has the same primary address ...  */
+        if (!compare_eth(orig_node->orig,
+                         neigh_node->orig_node->primary_addr))
+                goto candidate_del;
+
+        if (!orig_node->router)
+                goto candidate_del;
+
+        best_tq = orig_node->router->tq_avg;
+
+        /* ... and is good enough to be considered */
+        if (neigh_node->tq_avg < best_tq - BONDING_TQ_THRESHOLD)
+                goto candidate_del;
+
+        /**
+         * check if we have another candidate with the same mac address or
+         * interface. If we do, we won't select this candidate because of
+         * possible interference.
+         */
+        hlist_for_each_entry_rcu(tmp_neigh_node, node,
+                                 &orig_node->neigh_list, list) {
+
+                if (tmp_neigh_node == neigh_node)
+                        continue;
+
+                /* we only care if the other candidate is even
+                * considered as candidate. */
+                if (list_empty(&tmp_neigh_node->bonding_list))
+                        continue;
+
+                if ((neigh_node->if_incoming == tmp_neigh_node->if_incoming) ||
+                    (compare_eth(neigh_node->addr, tmp_neigh_node->addr))) {
+                        interference_candidate = 1;
+                        break;
+                }
+        }
+
+        /* don't care further if it is an interference candidate */
+        if (interference_candidate)
+                goto candidate_del;
+
+        /* this neighbor already is part of our candidate list */
+        if (!list_empty(&neigh_node->bonding_list))
+                goto out;
+
+        if (!atomic_inc_not_zero(&neigh_node->refcount))
+                goto out;
+
+        list_add_rcu(&neigh_node->bonding_list, &orig_node->bond_list);
+        atomic_inc(&orig_node->bond_candidates);
+        goto out;
+
+candidate_del:
+        bonding_candidate_del(orig_node, neigh_node);
+
+out:
+        spin_unlock_bh(&orig_node->neigh_list_lock);
+        return;
+}
+
+/* copy primary address for bonding */
+static void bonding_save_primary(struct orig_node *orig_node,
+                                 struct orig_node *orig_neigh_node,
+                                 struct batman_packet *batman_packet)
+{
+        if (!(batman_packet->flags & PRIMARIES_FIRST_HOP))
+                return;
+
+        memcpy(orig_neigh_node->primary_addr, orig_node->orig, ETH_ALEN);
 }
 
 static void update_orig(struct bat_priv *bat_priv,
                         struct orig_node *orig_node,
                         struct ethhdr *ethhdr,
                         struct batman_packet *batman_packet,
-                        struct batman_if *if_incoming,
+                        struct hard_iface *if_incoming,
                         unsigned char *hna_buff, int hna_buff_len,
                         char is_duplicate)
 {
         struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
+        struct orig_node *orig_node_tmp;
+        struct hlist_node *node;
         int tmp_hna_buff_len;
+        uint8_t bcast_own_sum_orig, bcast_own_sum_neigh;
 
         bat_dbg(DBG_BATMAN, bat_priv, "update_originator(): "
                 "Searching and updating originator entry of received packet\n");
 
-        list_for_each_entry(tmp_neigh_node, &orig_node->neigh_list, list) {
-                if (compare_orig(tmp_neigh_node->addr, ethhdr->h_source) &&
-                    (tmp_neigh_node->if_incoming == if_incoming)) {
+        rcu_read_lock();
+        hlist_for_each_entry_rcu(tmp_neigh_node, node,
+                                 &orig_node->neigh_list, list) {
+                if (compare_eth(tmp_neigh_node->addr, ethhdr->h_source) &&
+                    (tmp_neigh_node->if_incoming == if_incoming) &&
+                     atomic_inc_not_zero(&tmp_neigh_node->refcount)) {
+                        if (neigh_node)
+                                neigh_node_free_ref(neigh_node);
                         neigh_node = tmp_neigh_node;
                         continue;
                 }
@@ -280,16 +407,20 @@ static void update_orig(struct bat_priv *bat_priv,
 
                 orig_tmp = get_orig_node(bat_priv, ethhdr->h_source);
                 if (!orig_tmp)
-                        return;
+                        goto unlock;
 
                 neigh_node = create_neighbor(orig_node, orig_tmp,
                                              ethhdr->h_source, if_incoming);
+
+                orig_node_free_ref(orig_tmp);
                 if (!neigh_node)
-                        return;
+                        goto unlock;
         } else
                 bat_dbg(DBG_BATMAN, bat_priv,
                         "Updating existing last-hop neighbor of originator\n");
 
+        rcu_read_unlock();
+
         orig_node->flags = batman_packet->flags;
         neigh_node->last_valid = jiffies;
 
@@ -303,6 +434,8 @@ static void update_orig(struct bat_priv *bat_priv,
                 neigh_node->last_ttl = batman_packet->ttl;
         }
 
+        bonding_candidate_add(orig_node, neigh_node);
+
         tmp_hna_buff_len = (hna_buff_len > batman_packet->num_hna * ETH_ALEN ?
                             batman_packet->num_hna * ETH_ALEN : hna_buff_len);
 
@@ -319,10 +452,22 @@ static void update_orig(struct bat_priv *bat_priv,
         /* if the TQ is the same and the link not more symetric we
          * won't consider it either */
         if ((orig_node->router) &&
-             ((neigh_node->tq_avg == orig_node->router->tq_avg) &&
-             (orig_node->router->orig_node->bcast_own_sum[if_incoming->if_num]
-              >= neigh_node->orig_node->bcast_own_sum[if_incoming->if_num])))
-                goto update_hna;
+             (neigh_node->tq_avg == orig_node->router->tq_avg)) {
+                orig_node_tmp = orig_node->router->orig_node;
+                spin_lock_bh(&orig_node_tmp->ogm_cnt_lock);
+                bcast_own_sum_orig =
+                        orig_node_tmp->bcast_own_sum[if_incoming->if_num];
+                spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock);
+
+                orig_node_tmp = neigh_node->orig_node;
+                spin_lock_bh(&orig_node_tmp->ogm_cnt_lock);
+                bcast_own_sum_neigh =
+                        orig_node_tmp->bcast_own_sum[if_incoming->if_num];
+                spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock);
+
+                if (bcast_own_sum_orig >= bcast_own_sum_neigh)
+                        goto update_hna;
+        }
 
         update_routes(bat_priv, orig_node, neigh_node,
                       hna_buff, tmp_hna_buff_len);
@@ -343,6 +488,14 @@ update_gw:
             (atomic_read(&bat_priv->gw_mode) == GW_MODE_CLIENT) &&
             (atomic_read(&bat_priv->gw_sel_class) > 2))
                 gw_check_election(bat_priv, orig_node);
+
+        goto out;
+
+unlock:
+        rcu_read_unlock();
+out:
+        if (neigh_node)
+                neigh_node_free_ref(neigh_node);
 }
 
 /* checks whether the host restarted and is in the protection time.
@@ -380,34 +533,38 @@ static int window_protected(struct bat_priv *bat_priv,
  */
 static char count_real_packets(struct ethhdr *ethhdr,
                                struct batman_packet *batman_packet,
-                               struct batman_if *if_incoming)
+                               struct hard_iface *if_incoming)
 {
         struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
         struct orig_node *orig_node;
         struct neigh_node *tmp_neigh_node;
+        struct hlist_node *node;
         char is_duplicate = 0;
         int32_t seq_diff;
         int need_update = 0;
-        int set_mark;
+        int set_mark, ret = -1;
 
         orig_node = get_orig_node(bat_priv, batman_packet->orig);
         if (!orig_node)
                 return 0;
 
+        spin_lock_bh(&orig_node->ogm_cnt_lock);
         seq_diff = batman_packet->seqno - orig_node->last_real_seqno;
 
         /* signalize caller that the packet is to be dropped. */
         if (window_protected(bat_priv, seq_diff,
                              &orig_node->batman_seqno_reset))
-                return -1;
+                goto out;
 
-        list_for_each_entry(tmp_neigh_node, &orig_node->neigh_list, list) {
+        rcu_read_lock();
+        hlist_for_each_entry_rcu(tmp_neigh_node, node,
+                                 &orig_node->neigh_list, list) {
 
                 is_duplicate |= get_bit_status(tmp_neigh_node->real_bits,
                                                orig_node->last_real_seqno,
                                                batman_packet->seqno);
 
-                if (compare_orig(tmp_neigh_node->addr, ethhdr->h_source) &&
+                if (compare_eth(tmp_neigh_node->addr, ethhdr->h_source) &&
                     (tmp_neigh_node->if_incoming == if_incoming))
                         set_mark = 1;
                 else
@@ -421,6 +578,7 @@ static char count_real_packets(struct ethhdr *ethhdr,
                 tmp_neigh_node->real_packet_count =
                         bit_packet_count(tmp_neigh_node->real_bits);
         }
+        rcu_read_unlock();
 
         if (need_update) {
                 bat_dbg(DBG_BATMAN, bat_priv,
@@ -429,123 +587,21 @@ static char count_real_packets(struct ethhdr *ethhdr,
                 orig_node->last_real_seqno = batman_packet->seqno;
         }
 
-        return is_duplicate;
-}
-
-/* copy primary address for bonding */
-static void mark_bonding_address(struct bat_priv *bat_priv,
-                                 struct orig_node *orig_node,
-                                 struct orig_node *orig_neigh_node,
-                                 struct batman_packet *batman_packet)
+        ret = is_duplicate;
 
-{
-        if (batman_packet->flags & PRIMARIES_FIRST_HOP)
-                memcpy(orig_neigh_node->primary_addr,
-                       orig_node->orig, ETH_ALEN);
-
-        return;
-}
-
-/* mark possible bond.candidates in the neighbor list */
-void update_bonding_candidates(struct bat_priv *bat_priv,
-                               struct orig_node *orig_node)
-{
-        int candidates;
-        int interference_candidate;
-        int best_tq;
-        struct neigh_node *tmp_neigh_node, *tmp_neigh_node2;
-        struct neigh_node *first_candidate, *last_candidate;
-
-        /* update the candidates for this originator */
-        if (!orig_node->router) {
-                orig_node->bond.candidates = 0;
-                return;
-        }
-
-        best_tq = orig_node->router->tq_avg;
-
-        /* update bond.candidates */
-
-        candidates = 0;
-
-        /* mark other nodes which also received "PRIMARIES FIRST HOP" packets
-         * as "bonding partner" */
-
-        /* first, zero the list */
-        list_for_each_entry(tmp_neigh_node, &orig_node->neigh_list, list) {
-                tmp_neigh_node->next_bond_candidate = NULL;
-        }
-
-        first_candidate = NULL;
-        last_candidate = NULL;
-        list_for_each_entry(tmp_neigh_node, &orig_node->neigh_list, list) {
-
-                /* only consider if it has the same primary address ...  */
-                if (memcmp(orig_node->orig,
-                                tmp_neigh_node->orig_node->primary_addr,
-                                ETH_ALEN) != 0)
-                        continue;
-
-                /* ... and is good enough to be considered */
-                if (tmp_neigh_node->tq_avg < best_tq - BONDING_TQ_THRESHOLD)
-                        continue;
-
-                /* check if we have another candidate with the same
-                 * mac address or interface. If we do, we won't
-                 * select this candidate because of possible interference. */
-
-                interference_candidate = 0;
-                list_for_each_entry(tmp_neigh_node2,
-                                &orig_node->neigh_list, list) {
-
-                        if (tmp_neigh_node2 == tmp_neigh_node)
-                                continue;
-
-                        /* we only care if the other candidate is even
-                         * considered as candidate. */
-                        if (!tmp_neigh_node2->next_bond_candidate)
-                                continue;
-
-
-                        if ((tmp_neigh_node->if_incoming ==
-                                tmp_neigh_node2->if_incoming)
-                                || (memcmp(tmp_neigh_node->addr,
-                                tmp_neigh_node2->addr, ETH_ALEN) == 0)) {
-
-                                interference_candidate = 1;
-                                break;
-                        }
-                }
-                /* don't care further if it is an interference candidate */
-                if (interference_candidate)
-                        continue;
-
-                if (!first_candidate) {
-                        first_candidate = tmp_neigh_node;
-                        tmp_neigh_node->next_bond_candidate = first_candidate;
-                } else
-                        tmp_neigh_node->next_bond_candidate = last_candidate;
-
-                last_candidate = tmp_neigh_node;
-
-                candidates++;
-        }
-
-        if (candidates > 0) {
-                first_candidate->next_bond_candidate = last_candidate;
-                orig_node->bond.selected = first_candidate;
-        }
-
-        orig_node->bond.candidates = candidates;
+out:
+        spin_unlock_bh(&orig_node->ogm_cnt_lock);
+        orig_node_free_ref(orig_node);
+        return ret;
 }
 
 void receive_bat_packet(struct ethhdr *ethhdr,
-                                struct batman_packet *batman_packet,
-                                unsigned char *hna_buff, int hna_buff_len,
-                                struct batman_if *if_incoming)
+                        struct batman_packet *batman_packet,
+                        unsigned char *hna_buff, int hna_buff_len,
+                        struct hard_iface *if_incoming)
 {
         struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
-        struct batman_if *batman_if;
+        struct hard_iface *hard_iface;
         struct orig_node *orig_neigh_node, *orig_node;
         char has_directlink_flag;
         char is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0;
@@ -573,8 +629,8 @@ void receive_bat_packet(struct ethhdr *ethhdr,
 
         has_directlink_flag = (batman_packet->flags & DIRECTLINK ? 1 : 0);
 
-        is_single_hop_neigh = (compare_orig(ethhdr->h_source,
-                                            batman_packet->orig) ? 1 : 0);
+        is_single_hop_neigh = (compare_eth(ethhdr->h_source,
+                                           batman_packet->orig) ? 1 : 0);
 
         bat_dbg(DBG_BATMAN, bat_priv,
                 "Received BATMAN packet via NB: %pM, IF: %s [%pM] "
@@ -587,26 +643,26 @@ void receive_bat_packet(struct ethhdr *ethhdr,
                 has_directlink_flag);
 
         rcu_read_lock();
-        list_for_each_entry_rcu(batman_if, &if_list, list) {
-                if (batman_if->if_status != IF_ACTIVE)
+        list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
+                if (hard_iface->if_status != IF_ACTIVE)
                         continue;
 
-                if (batman_if->soft_iface != if_incoming->soft_iface)
+                if (hard_iface->soft_iface != if_incoming->soft_iface)
                         continue;
 
-                if (compare_orig(ethhdr->h_source,
-                                 batman_if->net_dev->dev_addr))
+                if (compare_eth(ethhdr->h_source,
+                                hard_iface->net_dev->dev_addr))
                         is_my_addr = 1;
 
-                if (compare_orig(batman_packet->orig,
-                                 batman_if->net_dev->dev_addr))
+                if (compare_eth(batman_packet->orig,
+                                hard_iface->net_dev->dev_addr))
                         is_my_orig = 1;
 
-                if (compare_orig(batman_packet->prev_sender,
-                                 batman_if->net_dev->dev_addr))
+                if (compare_eth(batman_packet->prev_sender,
+                                hard_iface->net_dev->dev_addr))
                         is_my_oldorig = 1;
 
-                if (compare_orig(ethhdr->h_source, broadcast_addr))
+                if (compare_eth(ethhdr->h_source, broadcast_addr))
                         is_broadcast = 1;
         }
         rcu_read_unlock();
@@ -638,7 +694,6 @@ void receive_bat_packet(struct ethhdr *ethhdr,
                 int offset;
 
                 orig_neigh_node = get_orig_node(bat_priv, ethhdr->h_source);
-
                 if (!orig_neigh_node)
                         return;
 
@@ -647,18 +702,22 @@ void receive_bat_packet(struct ethhdr *ethhdr,
                 /* if received seqno equals last send seqno save new
                  * seqno for bidirectional check */
                 if (has_directlink_flag &&
-                    compare_orig(if_incoming->net_dev->dev_addr,
-                                 batman_packet->orig) &&
+                    compare_eth(if_incoming->net_dev->dev_addr,
+                                batman_packet->orig) &&
                     (batman_packet->seqno - if_incoming_seqno + 2 == 0)) {
                         offset = if_incoming->if_num * NUM_WORDS;
+
+                        spin_lock_bh(&orig_neigh_node->ogm_cnt_lock);
                         word = &(orig_neigh_node->bcast_own[offset]);
                         bit_mark(word, 0);
                         orig_neigh_node->bcast_own_sum[if_incoming->if_num] =
                                 bit_packet_count(word);
+                        spin_unlock_bh(&orig_neigh_node->ogm_cnt_lock);
                 }
 
                 bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: "
                         "originator packet from myself (via neighbor)\n");
+                orig_node_free_ref(orig_neigh_node);
                 return;
         }
 
@@ -679,27 +738,27 @@ void receive_bat_packet(struct ethhdr *ethhdr,
                 bat_dbg(DBG_BATMAN, bat_priv,
                         "Drop packet: packet within seqno protection time "
                         "(sender: %pM)\n", ethhdr->h_source);
-                return;
+                goto out;
         }
 
         if (batman_packet->tq == 0) {
                 bat_dbg(DBG_BATMAN, bat_priv,
                         "Drop packet: originator packet with tq equal 0\n");
-                return;
+                goto out;
         }
 
         /* avoid temporary routing loops */
         if ((orig_node->router) &&
             (orig_node->router->orig_node->router) &&
-            (compare_orig(orig_node->router->addr,
-                          batman_packet->prev_sender)) &&
-            !(compare_orig(batman_packet->orig, batman_packet->prev_sender)) &&
-            (compare_orig(orig_node->router->addr,
-                          orig_node->router->orig_node->router->addr))) {
+            (compare_eth(orig_node->router->addr,
+                         batman_packet->prev_sender)) &&
+            !(compare_eth(batman_packet->orig, batman_packet->prev_sender)) &&
+            (compare_eth(orig_node->router->addr,
+                         orig_node->router->orig_node->router->addr))) {
                 bat_dbg(DBG_BATMAN, bat_priv,
                         "Drop packet: ignoring all rebroadcast packets that "
                         "may make me loop (sender: %pM)\n", ethhdr->h_source);
-                return;
+                goto out;
         }
 
         /* if sender is a direct neighbor the sender mac equals
@@ -708,19 +767,21 @@ void receive_bat_packet(struct ethhdr *ethhdr,
                            orig_node :
                            get_orig_node(bat_priv, ethhdr->h_source));
         if (!orig_neigh_node)
-                return;
+                goto out;
 
         /* drop packet if sender is not a direct neighbor and if we
          * don't route towards it */
         if (!is_single_hop_neigh && (!orig_neigh_node->router)) {
                 bat_dbg(DBG_BATMAN, bat_priv,
                         "Drop packet: OGM via unknown neighbor!\n");
-                return;
+                goto out_neigh;
         }
 
         is_bidirectional = is_bidirectional_neigh(orig_node, orig_neigh_node,
                                                 batman_packet, if_incoming);
 
+        bonding_save_primary(orig_node, orig_neigh_node, batman_packet);
+
         /* update ranking if it is not a duplicate or has the same
          * seqno and similar ttl as the non-duplicate */
         if (is_bidirectional &&
@@ -730,10 +791,6 @@ void receive_bat_packet(struct ethhdr *ethhdr,
                 update_orig(bat_priv, orig_node, ethhdr, batman_packet,
                             if_incoming, hna_buff, hna_buff_len, is_duplicate);
 
-        mark_bonding_address(bat_priv, orig_node,
-                             orig_neigh_node, batman_packet);
-        update_bonding_candidates(bat_priv, orig_node);
-
         /* is single hop (direct) neighbor */
         if (is_single_hop_neigh) {
 
@@ -743,31 +800,36 @@ void receive_bat_packet(struct ethhdr *ethhdr,
 
                 bat_dbg(DBG_BATMAN, bat_priv, "Forwarding packet: "
                         "rebroadcast neighbor packet with direct link flag\n");
-                return;
+                goto out_neigh;
         }
 
         /* multihop originator */
         if (!is_bidirectional) {
                 bat_dbg(DBG_BATMAN, bat_priv,
                         "Drop packet: not received via bidirectional link\n");
-                return;
+                goto out_neigh;
         }
 
         if (is_duplicate) {
                 bat_dbg(DBG_BATMAN, bat_priv,
                         "Drop packet: duplicate packet received\n");
-                return;
+                goto out_neigh;
         }
 
         bat_dbg(DBG_BATMAN, bat_priv,
                 "Forwarding packet: rebroadcast originator packet\n");
         schedule_forward_packet(orig_node, ethhdr, batman_packet,
                                 0, hna_buff_len, if_incoming);
+
+out_neigh:
+        if ((orig_neigh_node) && (!is_single_hop_neigh))
+                orig_node_free_ref(orig_neigh_node);
+out:
+        orig_node_free_ref(orig_node);
 }
 
-int recv_bat_packet(struct sk_buff *skb, struct batman_if *batman_if)
+int recv_bat_packet(struct sk_buff *skb, struct hard_iface *hard_iface)
 {
-        struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
         struct ethhdr *ethhdr;
 
         /* drop packet if it has not necessary minimum size */
@@ -794,12 +856,10 @@ int recv_bat_packet(struct sk_buff *skb, struct batman_if *batman_if)
 
         ethhdr = (struct ethhdr *)skb_mac_header(skb);
 
-        spin_lock_bh(&bat_priv->orig_hash_lock);
         receive_aggr_bat_packet(ethhdr,
                                 skb->data,
                                 skb_headlen(skb),
-                                batman_if);
-        spin_unlock_bh(&bat_priv->orig_hash_lock);
+                                hard_iface);
 
         kfree_skb(skb);
         return NET_RX_SUCCESS;
@@ -808,135 +868,144 @@ int recv_bat_packet(struct sk_buff *skb, struct batman_if *batman_if)
 static int recv_my_icmp_packet(struct bat_priv *bat_priv,
                                struct sk_buff *skb, size_t icmp_len)
 {
-        struct orig_node *orig_node;
+        struct orig_node *orig_node = NULL;
+        struct neigh_node *neigh_node = NULL;
         struct icmp_packet_rr *icmp_packet;
-        struct ethhdr *ethhdr;
-        struct batman_if *batman_if;
-        int ret;
-        uint8_t dstaddr[ETH_ALEN];
+        int ret = NET_RX_DROP;
 
         icmp_packet = (struct icmp_packet_rr *)skb->data;
-        ethhdr = (struct ethhdr *)skb_mac_header(skb);
 
         /* add data to device queue */
         if (icmp_packet->msg_type != ECHO_REQUEST) {
                 bat_socket_receive_packet(icmp_packet, icmp_len);
-                return NET_RX_DROP;
+                goto out;
         }
 
         if (!bat_priv->primary_if)
-                return NET_RX_DROP;
+                goto out;
 
         /* answer echo request (ping) */
         /* get routing information */
-        spin_lock_bh(&bat_priv->orig_hash_lock);
-        orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash,
-                                                   compare_orig, choose_orig,
-                                                   icmp_packet->orig));
-        ret = NET_RX_DROP;
-
-        if ((orig_node) && (orig_node->router)) {
-
-                /* don't lock while sending the packets ... we therefore
-                 * copy the required data before sending */
-                batman_if = orig_node->router->if_incoming;
-                memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
-                spin_unlock_bh(&bat_priv->orig_hash_lock);
-
-                /* create a copy of the skb, if needed, to modify it. */
-                if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
-                        return NET_RX_DROP;
+        rcu_read_lock();
+        orig_node = orig_hash_find(bat_priv, icmp_packet->orig);
 
-                icmp_packet = (struct icmp_packet_rr *)skb->data;
-                ethhdr = (struct ethhdr *)skb_mac_header(skb);
+        if (!orig_node)
+                goto unlock;
 
-                memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
-                memcpy(icmp_packet->orig,
-                       bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
-                icmp_packet->msg_type = ECHO_REPLY;
-                icmp_packet->ttl = TTL;
+        neigh_node = orig_node->router;
 
-                send_skb_packet(skb, batman_if, dstaddr);
-                ret = NET_RX_SUCCESS;
+        if (!neigh_node)
+                goto unlock;
 
-        } else
-                spin_unlock_bh(&bat_priv->orig_hash_lock);
+        if (!atomic_inc_not_zero(&neigh_node->refcount)) {
+                neigh_node = NULL;
+                goto unlock;
+        }
+
+        rcu_read_unlock();
+
+        /* create a copy of the skb, if needed, to modify it. */
+        if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
+                goto out;
+
+        icmp_packet = (struct icmp_packet_rr *)skb->data;
+
+        memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
+        memcpy(icmp_packet->orig,
+                bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
+        icmp_packet->msg_type = ECHO_REPLY;
+        icmp_packet->ttl = TTL;
 
+        send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
+        ret = NET_RX_SUCCESS;
+        goto out;
+
+unlock:
+        rcu_read_unlock();
+out:
+        if (neigh_node)
+                neigh_node_free_ref(neigh_node);
+        if (orig_node)
+                orig_node_free_ref(orig_node);
         return ret;
 }
 
 static int recv_icmp_ttl_exceeded(struct bat_priv *bat_priv,
-                                  struct sk_buff *skb, size_t icmp_len)
+                                  struct sk_buff *skb)
 {
-        struct orig_node *orig_node;
+        struct orig_node *orig_node = NULL;
+        struct neigh_node *neigh_node = NULL;
         struct icmp_packet *icmp_packet;
-        struct ethhdr *ethhdr;
-        struct batman_if *batman_if;
-        int ret;
-        uint8_t dstaddr[ETH_ALEN];
+        int ret = NET_RX_DROP;
 
         icmp_packet = (struct icmp_packet *)skb->data;
-        ethhdr = (struct ethhdr *)skb_mac_header(skb);
 
         /* send TTL exceeded if packet is an echo request (traceroute) */
         if (icmp_packet->msg_type != ECHO_REQUEST) {
                 pr_debug("Warning - can't forward icmp packet from %pM to "
                          "%pM: ttl exceeded\n", icmp_packet->orig,
                          icmp_packet->dst);
-                return NET_RX_DROP;
+                goto out;
         }
 
         if (!bat_priv->primary_if)
-                return NET_RX_DROP;
+                goto out;
 
         /* get routing information */
-        spin_lock_bh(&bat_priv->orig_hash_lock);
-        orig_node = ((struct orig_node *)
-                     hash_find(bat_priv->orig_hash, compare_orig, choose_orig,
-                               icmp_packet->orig));
-        ret = NET_RX_DROP;
-
-        if ((orig_node) && (orig_node->router)) {
-
-                /* don't lock while sending the packets ... we therefore
-                 * copy the required data before sending */
-                batman_if = orig_node->router->if_incoming;
-                memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
-                spin_unlock_bh(&bat_priv->orig_hash_lock);
-
-                /* create a copy of the skb, if needed, to modify it. */
-                if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
-                        return NET_RX_DROP;
+        rcu_read_lock();
+        orig_node = orig_hash_find(bat_priv, icmp_packet->orig);
 
-                icmp_packet = (struct icmp_packet *) skb->data;
-                ethhdr = (struct ethhdr *)skb_mac_header(skb);
+        if (!orig_node)
+                goto unlock;
 
-                memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
-                memcpy(icmp_packet->orig,
-                       bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
-                icmp_packet->msg_type = TTL_EXCEEDED;
-                icmp_packet->ttl = TTL;
+        neigh_node = orig_node->router;
 
-                send_skb_packet(skb, batman_if, dstaddr);
-                ret = NET_RX_SUCCESS;
+        if (!neigh_node)
+                goto unlock;
 
-        } else
-                spin_unlock_bh(&bat_priv->orig_hash_lock);
+        if (!atomic_inc_not_zero(&neigh_node->refcount)) {
+                neigh_node = NULL;
+                goto unlock;
+        }
 
+        rcu_read_unlock();
+
+        /* create a copy of the skb, if needed, to modify it. */
+        if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
+                goto out;
+
+        icmp_packet = (struct icmp_packet *)skb->data;
+
+        memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
+        memcpy(icmp_packet->orig,
+                bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
+        icmp_packet->msg_type = TTL_EXCEEDED;
+        icmp_packet->ttl = TTL;
+
+        send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
+        ret = NET_RX_SUCCESS;
+        goto out;
+
+unlock:
+        rcu_read_unlock();
+out:
+        if (neigh_node)
+                neigh_node_free_ref(neigh_node);
+        if (orig_node)
+                orig_node_free_ref(orig_node);
         return ret;
 }
 
 
-int recv_icmp_packet(struct sk_buff *skb, struct batman_if *recv_if)
+int recv_icmp_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 {
         struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
         struct icmp_packet_rr *icmp_packet;
         struct ethhdr *ethhdr;
-        struct orig_node *orig_node;
-        struct batman_if *batman_if;
+        struct orig_node *orig_node = NULL;
+        struct neigh_node *neigh_node = NULL;
         int hdr_size = sizeof(struct icmp_packet);
-        int ret;
-        uint8_t dstaddr[ETH_ALEN];
+        int ret = NET_RX_DROP;
 
         /**
          * we truncate all incoming icmp packets if they don't match our size
@@ -946,21 +1015,21 @@ int recv_icmp_packet(struct sk_buff *skb, struct batman_if *recv_if)
 
         /* drop packet if it has not necessary minimum size */
         if (unlikely(!pskb_may_pull(skb, hdr_size)))
-                return NET_RX_DROP;
+                goto out;
 
         ethhdr = (struct ethhdr *)skb_mac_header(skb);
 
         /* packet with unicast indication but broadcast recipient */
         if (is_broadcast_ether_addr(ethhdr->h_dest))
-                return NET_RX_DROP;
+                goto out;
 
         /* packet with broadcast sender address */
         if (is_broadcast_ether_addr(ethhdr->h_source))
-                return NET_RX_DROP;
+                goto out;
 
         /* not for me */
         if (!is_my_mac(ethhdr->h_dest))
-                return NET_RX_DROP;
+                goto out;
 
         icmp_packet = (struct icmp_packet_rr *)skb->data;
 
@@ -978,53 +1047,61 @@ int recv_icmp_packet(struct sk_buff *skb, struct batman_if *recv_if)
 
         /* TTL exceeded */
         if (icmp_packet->ttl < 2)
-                return recv_icmp_ttl_exceeded(bat_priv, skb, hdr_size);
-
-        ret = NET_RX_DROP;
+                return recv_icmp_ttl_exceeded(bat_priv, skb);
 
         /* get routing information */
-        spin_lock_bh(&bat_priv->orig_hash_lock);
-        orig_node = ((struct orig_node *)
-                     hash_find(bat_priv->orig_hash, compare_orig, choose_orig,
-                               icmp_packet->dst));
+        rcu_read_lock();
+        orig_node = orig_hash_find(bat_priv, icmp_packet->dst);
 
-        if ((orig_node) && (orig_node->router)) {
+        if (!orig_node)
+                goto unlock;
 
-                /* don't lock while sending the packets ... we therefore
-                 * copy the required data before sending */
-                batman_if = orig_node->router->if_incoming;
-                memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
-                spin_unlock_bh(&bat_priv->orig_hash_lock);
+        neigh_node = orig_node->router;
 
-                /* create a copy of the skb, if needed, to modify it. */
-                if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
-                        return NET_RX_DROP;
+        if (!neigh_node)
+                goto unlock;
 
-                icmp_packet = (struct icmp_packet_rr *)skb->data;
-                ethhdr = (struct ethhdr *)skb_mac_header(skb);
+        if (!atomic_inc_not_zero(&neigh_node->refcount)) {
+                neigh_node = NULL;
+                goto unlock;
+        }
 
-                /* decrement ttl */
-                icmp_packet->ttl--;
+        rcu_read_unlock();
 
-                /* route it */
-                send_skb_packet(skb, batman_if, dstaddr);
-                ret = NET_RX_SUCCESS;
+        /* create a copy of the skb, if needed, to modify it. */
+        if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
+                goto out;
 
-        } else
-                spin_unlock_bh(&bat_priv->orig_hash_lock);
+        icmp_packet = (struct icmp_packet_rr *)skb->data;
+
+        /* decrement ttl */
+        icmp_packet->ttl--;
 
+        /* route it */
+        send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
+        ret = NET_RX_SUCCESS;
+        goto out;
+
+unlock:
+        rcu_read_unlock();
+out:
+        if (neigh_node)
+                neigh_node_free_ref(neigh_node);
+        if (orig_node)
+                orig_node_free_ref(orig_node);
         return ret;
 }
 
 /* find a suitable router for this originator, and use
- * bonding if possible. */
+ * bonding if possible. increases the found neighbors
+ * refcount.*/
 struct neigh_node *find_router(struct bat_priv *bat_priv,
                                struct orig_node *orig_node,
-                               struct batman_if *recv_if)
+                               struct hard_iface *recv_if)
 {
         struct orig_node *primary_orig_node;
         struct orig_node *router_orig;
-        struct neigh_node *router, *first_candidate, *best_router;
+        struct neigh_node *router, *first_candidate, *tmp_neigh_node;
         static uint8_t zero_mac[ETH_ALEN] = {0, 0, 0, 0, 0, 0};
         int bonding_enabled;
 
@@ -1036,78 +1113,128 @@ struct neigh_node *find_router(struct bat_priv *bat_priv,
 
         /* without bonding, the first node should
          * always choose the default router. */
-
         bonding_enabled = atomic_read(&bat_priv->bonding);
 
-        if ((!recv_if) && (!bonding_enabled))
-                return orig_node->router;
-
+        rcu_read_lock();
+        /* select default router to output */
+        router = orig_node->router;
         router_orig = orig_node->router->orig_node;
+        if (!router_orig || !atomic_inc_not_zero(&router->refcount)) {
+                rcu_read_unlock();
+                return NULL;
+        }
+
+        if ((!recv_if) && (!bonding_enabled))
+                goto return_router;
 
         /* if we have something in the primary_addr, we can search
          * for a potential bonding candidate. */
-        if (memcmp(router_orig->primary_addr, zero_mac, ETH_ALEN) == 0)
-                return orig_node->router;
+        if (compare_eth(router_orig->primary_addr, zero_mac))
+                goto return_router;
 
         /* find the orig_node which has the primary interface. might
          * even be the same as our router_orig in many cases */
 
-        if (memcmp(router_orig->primary_addr,
-                                router_orig->orig, ETH_ALEN) == 0) {
+        if (compare_eth(router_orig->primary_addr, router_orig->orig)) {
                 primary_orig_node = router_orig;
         } else {
-                primary_orig_node = hash_find(bat_priv->orig_hash, compare_orig,
-                                               choose_orig,
-                                               router_orig->primary_addr);
-
+                primary_orig_node = orig_hash_find(bat_priv,
+                                                   router_orig->primary_addr);
                 if (!primary_orig_node)
-                        return orig_node->router;
+                        goto return_router;
+
+                orig_node_free_ref(primary_orig_node);
         }
 
         /* with less than 2 candidates, we can't do any
          * bonding and prefer the original router. */
-
-        if (primary_orig_node->bond.candidates < 2)
-                return orig_node->router;
+        if (atomic_read(&primary_orig_node->bond_candidates) < 2)
+                goto return_router;
 
 
         /* all nodes between should choose a candidate which
          * is is not on the interface where the packet came
          * in. */
-        first_candidate = primary_orig_node->bond.selected;
-        router = first_candidate;
+
+        neigh_node_free_ref(router);
+        first_candidate = NULL;
+        router = NULL;
 
         if (bonding_enabled) {
                 /* in the bonding case, send the packets in a round
                  * robin fashion over the remaining interfaces. */
-                do {
+
+                list_for_each_entry_rcu(tmp_neigh_node,
+                                &primary_orig_node->bond_list, bonding_list) {
+                        if (!first_candidate)
+                                first_candidate = tmp_neigh_node;
                         /* recv_if == NULL on the first node. */
-                        if (router->if_incoming != recv_if)
+                        if (tmp_neigh_node->if_incoming != recv_if &&
+                            atomic_inc_not_zero(&tmp_neigh_node->refcount)) {
+                                router = tmp_neigh_node;
                                 break;
+                        }
+                }
+
+                /* use the first candidate if nothing was found. */
+                if (!router && first_candidate &&
+                    atomic_inc_not_zero(&first_candidate->refcount))
+                        router = first_candidate;
 
-                        router = router->next_bond_candidate;
-                } while (router != first_candidate);
+                if (!router) {
+                        rcu_read_unlock();
+                        return NULL;
+                }
 
-                primary_orig_node->bond.selected = router->next_bond_candidate;
+                /* selected should point to the next element
+                 * after the current router */
+                spin_lock_bh(&primary_orig_node->neigh_list_lock);
+                /* this is a list_move(), which unfortunately
+                 * does not exist as rcu version */
+                list_del_rcu(&primary_orig_node->bond_list);
+                list_add_rcu(&primary_orig_node->bond_list,
+                                &router->bonding_list);
+                spin_unlock_bh(&primary_orig_node->neigh_list_lock);
 
         } else {
                 /* if bonding is disabled, use the best of the
                  * remaining candidates which are not using
                  * this interface. */
-                best_router = first_candidate;
+                list_for_each_entry_rcu(tmp_neigh_node,
+                        &primary_orig_node->bond_list, bonding_list) {
+                        if (!first_candidate)
+                                first_candidate = tmp_neigh_node;
 
-                do {
                         /* recv_if == NULL on the first node. */
-                        if ((router->if_incoming != recv_if) &&
-                                (router->tq_avg > best_router->tq_avg))
-                                        best_router = router;
+                        if (tmp_neigh_node->if_incoming == recv_if)
+                                continue;
 
-                        router = router->next_bond_candidate;
-                } while (router != first_candidate);
+                        if (!atomic_inc_not_zero(&tmp_neigh_node->refcount))
+                                continue;
 
-                router = best_router;
-        }
+                        /* if we don't have a router yet
+                         * or this one is better, choose it. */
+                        if ((!router) ||
+                            (tmp_neigh_node->tq_avg > router->tq_avg)) {
+                                /* decrement refcount of
+                                 * previously selected router */
+                                if (router)
+                                        neigh_node_free_ref(router);
+
+                                router = tmp_neigh_node;
+                                atomic_inc_not_zero(&router->refcount);
+                        }
+
+                        neigh_node_free_ref(tmp_neigh_node);
+                }
 
+                /* use the first candidate if nothing was found. */
+                if (!router && first_candidate &&
+                    atomic_inc_not_zero(&first_candidate->refcount))
+                        router = first_candidate;
+        }
+return_router:
+        rcu_read_unlock();
         return router;
 }
 
@@ -1136,17 +1263,14 @@ static int check_unicast_packet(struct sk_buff *skb, int hdr_size)
         return 0;
 }
 
-int route_unicast_packet(struct sk_buff *skb, struct batman_if *recv_if,
-                         int hdr_size)
+int route_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 {
         struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
-        struct orig_node *orig_node;
-        struct neigh_node *router;
-        struct batman_if *batman_if;
-        uint8_t dstaddr[ETH_ALEN];
+        struct orig_node *orig_node = NULL;
+        struct neigh_node *neigh_node = NULL;
         struct unicast_packet *unicast_packet;
         struct ethhdr *ethhdr = (struct ethhdr *)skb_mac_header(skb);
-        int ret;
+        int ret = NET_RX_DROP;
         struct sk_buff *new_skb;
 
         unicast_packet = (struct unicast_packet *)skb->data;
@@ -1156,53 +1280,51 @@ int route_unicast_packet(struct sk_buff *skb, struct batman_if *recv_if,
                 pr_debug("Warning - can't forward unicast packet from %pM to "
                          "%pM: ttl exceeded\n", ethhdr->h_source,
                          unicast_packet->dest);
-                return NET_RX_DROP;
+                goto out;
         }
 
         /* get routing information */
-        spin_lock_bh(&bat_priv->orig_hash_lock);
-        orig_node = ((struct orig_node *)
-                     hash_find(bat_priv->orig_hash, compare_orig, choose_orig,
-                               unicast_packet->dest));
-
-        router = find_router(bat_priv, orig_node, recv_if);
+        rcu_read_lock();
+        orig_node = orig_hash_find(bat_priv, unicast_packet->dest);
 
-        if (!router) {
-                spin_unlock_bh(&bat_priv->orig_hash_lock);
-                return NET_RX_DROP;
-        }
+        if (!orig_node)
+                goto unlock;
 
-        /* don't lock while sending the packets ... we therefore
-         * copy the required data before sending */
+        rcu_read_unlock();
 
-        batman_if = router->if_incoming;
-        memcpy(dstaddr, router->addr, ETH_ALEN);
+        /* find_router() increases neigh_nodes refcount if found. */
+        neigh_node = find_router(bat_priv, orig_node, recv_if);
 
-        spin_unlock_bh(&bat_priv->orig_hash_lock);
+        if (!neigh_node)
+                goto out;
 
         /* create a copy of the skb, if needed, to modify it. */
         if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
-                return NET_RX_DROP;
+                goto out;
 
         unicast_packet = (struct unicast_packet *)skb->data;
 
         if (unicast_packet->packet_type == BAT_UNICAST &&
             atomic_read(&bat_priv->fragmentation) &&
-            skb->len > batman_if->net_dev->mtu)
-                return frag_send_skb(skb, bat_priv, batman_if,
-                                     dstaddr);
+            skb->len > neigh_node->if_incoming->net_dev->mtu) {
+                ret = frag_send_skb(skb, bat_priv,
+                                    neigh_node->if_incoming, neigh_node->addr);
+                goto out;
+        }
 
         if (unicast_packet->packet_type == BAT_UNICAST_FRAG &&
-            2 * skb->len - hdr_size <= batman_if->net_dev->mtu) {
+            frag_can_reassemble(skb, neigh_node->if_incoming->net_dev->mtu)) {
 
                 ret = frag_reassemble_skb(skb, bat_priv, &new_skb);
 
                 if (ret == NET_RX_DROP)
-                        return NET_RX_DROP;
+                        goto out;
 
                 /* packet was buffered for late merge */
-                if (!new_skb)
-                        return NET_RX_SUCCESS;
+                if (!new_skb) {
+                        ret = NET_RX_SUCCESS;
+                        goto out;
+                }
 
                 skb = new_skb;
                 unicast_packet = (struct unicast_packet *)skb->data;
@@ -1212,12 +1334,21 @@ int route_unicast_packet(struct sk_buff *skb, struct batman_if *recv_if,
         unicast_packet->ttl--;
 
         /* route it */
-        send_skb_packet(skb, batman_if, dstaddr);
+        send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
+        ret = NET_RX_SUCCESS;
+        goto out;
 
-        return NET_RX_SUCCESS;
+unlock:
+        rcu_read_unlock();
+out:
+        if (neigh_node)
+                neigh_node_free_ref(neigh_node);
+        if (orig_node)
+                orig_node_free_ref(orig_node);
+        return ret;
 }
 
-int recv_unicast_packet(struct sk_buff *skb, struct batman_if *recv_if)
+int recv_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 {
         struct unicast_packet *unicast_packet;
         int hdr_size = sizeof(struct unicast_packet);
@@ -1233,10 +1364,10 @@ int recv_unicast_packet(struct sk_buff *skb, struct batman_if *recv_if)
                 return NET_RX_SUCCESS;
         }
 
-        return route_unicast_packet(skb, recv_if, hdr_size);
+        return route_unicast_packet(skb, recv_if);
 }
 
-int recv_ucast_frag_packet(struct sk_buff *skb, struct batman_if *recv_if)
+int recv_ucast_frag_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 {
         struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
         struct unicast_frag_packet *unicast_packet;
@@ -1266,89 +1397,96 @@ int recv_ucast_frag_packet(struct sk_buff *skb, struct batman_if *recv_if)
                 return NET_RX_SUCCESS;
         }
 
-        return route_unicast_packet(skb, recv_if, hdr_size);
+        return route_unicast_packet(skb, recv_if);
 }
 
 
-int recv_bcast_packet(struct sk_buff *skb, struct batman_if *recv_if)
+int recv_bcast_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 {
         struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
-        struct orig_node *orig_node;
+        struct orig_node *orig_node = NULL;
         struct bcast_packet *bcast_packet;
         struct ethhdr *ethhdr;
         int hdr_size = sizeof(struct bcast_packet);
+        int ret = NET_RX_DROP;
         int32_t seq_diff;
 
         /* drop packet if it has not necessary minimum size */
         if (unlikely(!pskb_may_pull(skb, hdr_size)))
-                return NET_RX_DROP;
+                goto out;
 
         ethhdr = (struct ethhdr *)skb_mac_header(skb);
 
         /* packet with broadcast indication but unicast recipient */
         if (!is_broadcast_ether_addr(ethhdr->h_dest))
-                return NET_RX_DROP;
+                goto out;
 
         /* packet with broadcast sender address */
         if (is_broadcast_ether_addr(ethhdr->h_source))
-                return NET_RX_DROP;
+                goto out;
 
         /* ignore broadcasts sent by myself */
         if (is_my_mac(ethhdr->h_source))
-                return NET_RX_DROP;
+                goto out;
 
         bcast_packet = (struct bcast_packet *)skb->data;
 
         /* ignore broadcasts originated by myself */
         if (is_my_mac(bcast_packet->orig))
-                return NET_RX_DROP;
+                goto out;
 
         if (bcast_packet->ttl < 2)
-                return NET_RX_DROP;
+                goto out;
 
-        spin_lock_bh(&bat_priv->orig_hash_lock);
-        orig_node = ((struct orig_node *)
-                     hash_find(bat_priv->orig_hash, compare_orig, choose_orig,
-                               bcast_packet->orig));
+        rcu_read_lock();
+        orig_node = orig_hash_find(bat_priv, bcast_packet->orig);
 
-        if (!orig_node) {
-                spin_unlock_bh(&bat_priv->orig_hash_lock);
-                return NET_RX_DROP;
-        }
+        if (!orig_node)
+                goto rcu_unlock;
+
+        rcu_read_unlock();
+
+        spin_lock_bh(&orig_node->bcast_seqno_lock);
 
         /* check whether the packet is a duplicate */
-        if (get_bit_status(orig_node->bcast_bits,
-                           orig_node->last_bcast_seqno,
-                           ntohl(bcast_packet->seqno))) {
-                spin_unlock_bh(&bat_priv->orig_hash_lock);
-                return NET_RX_DROP;
-        }
+        if (get_bit_status(orig_node->bcast_bits, orig_node->last_bcast_seqno,
+                           ntohl(bcast_packet->seqno)))
+                goto spin_unlock;
 
         seq_diff = ntohl(bcast_packet->seqno) - orig_node->last_bcast_seqno;
 
         /* check whether the packet is old and the host just restarted. */
         if (window_protected(bat_priv, seq_diff,
-                             &orig_node->bcast_seqno_reset)) {
-                spin_unlock_bh(&bat_priv->orig_hash_lock);
-                return NET_RX_DROP;
-        }
+                             &orig_node->bcast_seqno_reset))
+                goto spin_unlock;
 
         /* mark broadcast in flood history, update window position
          * if required. */
         if (bit_get_packet(bat_priv, orig_node->bcast_bits, seq_diff, 1))
                 orig_node->last_bcast_seqno = ntohl(bcast_packet->seqno);
 
-        spin_unlock_bh(&bat_priv->orig_hash_lock);
+        spin_unlock_bh(&orig_node->bcast_seqno_lock);
+
         /* rebroadcast packet */
         add_bcast_packet_to_list(bat_priv, skb);
 
         /* broadcast for me */
         interface_rx(recv_if->soft_iface, skb, recv_if, hdr_size);
+        ret = NET_RX_SUCCESS;
+        goto out;
 
-        return NET_RX_SUCCESS;
+rcu_unlock:
+        rcu_read_unlock();
+        goto out;
+spin_unlock:
+        spin_unlock_bh(&orig_node->bcast_seqno_lock);
+out:
+        if (orig_node)
+                orig_node_free_ref(orig_node);
+        return ret;
 }
 
-int recv_vis_packet(struct sk_buff *skb, struct batman_if *recv_if)
+int recv_vis_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 {
         struct vis_packet *vis_packet;
         struct ethhdr *ethhdr;