Repository : ssh://git@open-mesh.org/batman-adv

On branch : master

commit 9bb33b8d88e318c4879d37d06ad28e3e018b9036 Author: Simon Wunderlich simon@open-mesh.com Date: Wed Nov 13 19:14:46 2013 +0100

batman-adv: split tq information in neigh_node struct

For the network wide multi interface optimization it is required to save metrics per outgoing interface in one neighbor. Therefore a new type is introduced to keep interface-specific information. This also requires some changes in access and list management.

The compare and equiv_or_better API calls are changed to take the outgoing interface into consideration.

Signed-off-by: Simon Wunderlich simon@open-mesh.com Signed-off-by: Marek Lindner mareklindner@neomailbox.ch

9bb33b8d88e318c4879d37d06ad28e3e018b9036 bat_iv_ogm.c | 267 ++++++++++++++++++++++++++++++++++++++++----------- compat.c | 8 -- compat.h | 1 - gateway_client.c | 75 +++++++++++++-- hard-interface.h | 17 ++++ main.h | 5 + originator.c | 224 ++++++++++++++++++++++++++++++++++++++---- originator.h | 7 ++ translation-table.c | 3 +- types.h | 74 +++++++++----- 10 files changed, 562 insertions(+), 119 deletions(-)

diff --git a/bat_iv_ogm.c b/bat_iv_ogm.c index de98884..05825c2 100644 --- a/bat_iv_ogm.c +++ b/bat_iv_ogm.c @@ -269,7 +269,14 @@ batadv_iv_ogm_neigh_new(struct batadv_hard_iface *hard_iface, if (!neigh_node) goto out;

- spin_lock_init(&neigh_node->bat_iv.lq_update_lock); + if (!atomic_inc_not_zero(&hard_iface->refcount)) { + kfree(neigh_node); + neigh_node = NULL; + goto out; + } + + neigh_node->orig_node = orig_neigh; + neigh_node->if_incoming = hard_iface;

batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "Creating new neighbor %pM for orig_node %pM on interface %s\n", @@ -892,15 +899,30 @@ static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface) batadv_hardif_free_ref(primary_if); }

+/** + * batadv_iv_ogm_orig_update - use OGM to update corresponding data in an + * originator + * @bat_priv: the bat priv with all the soft interface information + * @orig_node: the orig node who originally emitted the ogm packet + * @ethhdr: Ethernet header of the OGM + * @batadv_ogm_packet: the ogm packet + * @if_incoming: interface where the packet was received + * @if_outgoing: interface for which the retransmission should be considered + * @tt_buff: pointer to the tt buffer + * @dup_status: the duplicate status of this ogm packet. + */ static void batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node, const struct ethhdr *ethhdr, const struct batadv_ogm_packet *batadv_ogm_packet, struct batadv_hard_iface *if_incoming, + struct batadv_hard_iface *if_outgoing, const unsigned char *tt_buff, enum batadv_dup_status dup_status) { + struct batadv_neigh_ifinfo *neigh_ifinfo = NULL; + struct batadv_neigh_ifinfo *router_ifinfo = NULL; struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL; struct batadv_neigh_node *router = NULL; struct batadv_orig_node *orig_node_tmp; @@ -928,12 +950,21 @@ batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, if (dup_status != BATADV_NO_DUP) continue;

- spin_lock_bh(&tmp_neigh_node->bat_iv.lq_update_lock); - batadv_ring_buffer_set(tmp_neigh_node->bat_iv.tq_recv, - &tmp_neigh_node->bat_iv.tq_index, 0); - tq_avg = batadv_ring_buffer_avg(tmp_neigh_node->bat_iv.tq_recv); - tmp_neigh_node->bat_iv.tq_avg = tq_avg; - spin_unlock_bh(&tmp_neigh_node->bat_iv.lq_update_lock); + /* only update the entry for this outgoing interface */ + neigh_ifinfo = batadv_neigh_ifinfo_get(tmp_neigh_node, + if_outgoing); + if (!neigh_ifinfo) + continue; + + spin_lock_bh(&tmp_neigh_node->ifinfo_lock); + batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, + &neigh_ifinfo->bat_iv.tq_index, 0); + tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); + neigh_ifinfo->bat_iv.tq_avg = tq_avg; + spin_unlock_bh(&tmp_neigh_node->ifinfo_lock); + + batadv_neigh_ifinfo_free_ref(neigh_ifinfo); + neigh_ifinfo = NULL; }

if (!neigh_node) { @@ -955,20 +986,23 @@ batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, "Updating existing last-hop neighbor of originator\n");

rcu_read_unlock(); + neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); + if (!neigh_ifinfo) + goto out;

neigh_node->last_seen = jiffies;

- spin_lock_bh(&neigh_node->bat_iv.lq_update_lock); - batadv_ring_buffer_set(neigh_node->bat_iv.tq_recv, - &neigh_node->bat_iv.tq_index, + spin_lock_bh(&neigh_node->ifinfo_lock); + batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, + &neigh_ifinfo->bat_iv.tq_index, batadv_ogm_packet->tq); - tq_avg = batadv_ring_buffer_avg(neigh_node->bat_iv.tq_recv); - neigh_node->bat_iv.tq_avg = tq_avg; - spin_unlock_bh(&neigh_node->bat_iv.lq_update_lock); + tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); + neigh_ifinfo->bat_iv.tq_avg = tq_avg; + spin_unlock_bh(&neigh_node->ifinfo_lock);

if (dup_status == BATADV_NO_DUP) { orig_node->last_ttl = batadv_ogm_packet->header.ttl; - neigh_node->last_ttl = batadv_ogm_packet->header.ttl; + neigh_ifinfo->last_ttl = batadv_ogm_packet->header.ttl; }

/* if this neighbor already is our next hop there is nothing @@ -978,14 +1012,23 @@ batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, if (router == neigh_node) goto out;

- /* if this neighbor does not offer a better TQ we won't consider it */ - if (router && (router->bat_iv.tq_avg > neigh_node->bat_iv.tq_avg)) - goto out; + if (router) { + router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); + if (!router_ifinfo) + goto out; + + /* if this neighbor does not offer a better TQ we won't + * consider it + */ + if (router_ifinfo->bat_iv.tq_avg > neigh_ifinfo->bat_iv.tq_avg) + goto out; + }

/* if the TQ is the same and the link not more symmetric we * won't consider it either */ - if (router && (neigh_node->bat_iv.tq_avg == router->bat_iv.tq_avg)) { + if (router_ifinfo && + (neigh_ifinfo->bat_iv.tq_avg == router_ifinfo->bat_iv.tq_avg)) { orig_node_tmp = router->orig_node; spin_lock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); if_num = router->if_incoming->if_num; @@ -1012,15 +1055,31 @@ out: batadv_neigh_node_free_ref(neigh_node); if (router) batadv_neigh_node_free_ref(router); + if (neigh_ifinfo) + batadv_neigh_ifinfo_free_ref(neigh_ifinfo); + if (router_ifinfo) + batadv_neigh_ifinfo_free_ref(router_ifinfo); }

+/** + * batadv_iv_ogm_calc_tq - calculate tq for current received ogm packet + * @orig_node: the orig node who originally emitted the ogm packet + * @orig_neigh_node: the orig node struct of the neighbor who sent the packet + * @batadv_ogm_packet: the ogm packet + * @if_incoming: interface where the packet was received + * @if_outgoing: interface for which the retransmission should be considered + * + * Returns 1 if the link can be considered bidirectional, 0 otherwise + */ static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, struct batadv_orig_node *orig_neigh_node, struct batadv_ogm_packet *batadv_ogm_packet, - struct batadv_hard_iface *if_incoming) + struct batadv_hard_iface *if_incoming, + struct batadv_hard_iface *if_outgoing) { struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node; + struct batadv_neigh_ifinfo *neigh_ifinfo; uint8_t total_count; uint8_t orig_eq_count, neigh_rq_count, neigh_rq_inv, tq_own; unsigned int neigh_rq_inv_cube, neigh_rq_max_cube; @@ -1065,7 +1124,13 @@ static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); if_num = if_incoming->if_num; orig_eq_count = orig_neigh_node->bat_iv.bcast_own_sum[if_num]; - neigh_rq_count = neigh_node->bat_iv.real_packet_count; + neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); + if (neigh_ifinfo) { + neigh_rq_count = neigh_ifinfo->bat_iv.real_packet_count; + batadv_neigh_ifinfo_free_ref(neigh_ifinfo); + } else { + neigh_rq_count = 0; + } spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock);

/* pay attention to not get a value bigger than 100 % */ @@ -1129,17 +1194,20 @@ out: * @ethhdr: ethernet header of the packet * @batadv_ogm_packet: OGM packet to be considered * @if_incoming: interface on which the OGM packet was received + * @if_outgoing: interface for which the retransmission should be considered * * Returns duplicate status as enum batadv_dup_status */ static enum batadv_dup_status batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, const struct batadv_ogm_packet *batadv_ogm_packet, - const struct batadv_hard_iface *if_incoming) + const struct batadv_hard_iface *if_incoming, + struct batadv_hard_iface *if_outgoing) { struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); struct batadv_orig_node *orig_node; - struct batadv_neigh_node *tmp_neigh_node; + struct batadv_neigh_node *neigh_node; + struct batadv_neigh_ifinfo *neigh_ifinfo; int is_dup; int32_t seq_diff; int need_update = 0; @@ -1166,15 +1234,19 @@ batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, }

rcu_read_lock(); - hlist_for_each_entry_rcu(tmp_neigh_node, - &orig_node->neigh_list, list) { - neigh_addr = tmp_neigh_node->addr; - is_dup = batadv_test_bit(tmp_neigh_node->bat_iv.real_bits, + hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { + neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, + if_outgoing); + if (!neigh_ifinfo) + continue; + + neigh_addr = neigh_node->addr; + is_dup = batadv_test_bit(neigh_ifinfo->bat_iv.real_bits, orig_node->last_real_seqno, seqno);

if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && - tmp_neigh_node->if_incoming == if_incoming) { + neigh_node->if_incoming == if_incoming) { set_mark = 1; if (is_dup) ret = BATADV_NEIGH_DUP; @@ -1185,13 +1257,14 @@ batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, }

/* if the window moved, set the update flag. */ - bitmap = tmp_neigh_node->bat_iv.real_bits; + bitmap = neigh_ifinfo->bat_iv.real_bits; need_update |= batadv_bit_get_packet(bat_priv, bitmap, seq_diff, set_mark);

- packet_count = bitmap_weight(tmp_neigh_node->bat_iv.real_bits, + packet_count = bitmap_weight(bitmap, BATADV_TQ_LOCAL_WINDOW_SIZE); - tmp_neigh_node->bat_iv.real_packet_count = packet_count; + neigh_ifinfo->bat_iv.real_packet_count = packet_count; + batadv_neigh_ifinfo_free_ref(neigh_ifinfo); } rcu_read_unlock();

@@ -1218,6 +1291,7 @@ static void batadv_iv_ogm_process(const struct ethhdr *ethhdr, struct batadv_orig_node *orig_neigh_node, *orig_node, *orig_node_tmp; struct batadv_neigh_node *router = NULL, *router_router = NULL; struct batadv_neigh_node *orig_neigh_router = NULL; + struct batadv_neigh_ifinfo *router_ifinfo = NULL; int has_directlink_flag; int is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0; int is_bidirect; @@ -1350,7 +1424,8 @@ static void batadv_iv_ogm_process(const struct ethhdr *ethhdr, return;

dup_status = batadv_iv_ogm_update_seqnos(ethhdr, batadv_ogm_packet, - if_incoming); + if_incoming, + BATADV_IF_DEFAULT);

if (dup_status == BATADV_PROTECTED) { batadv_dbg(BATADV_DBG_BATMAN, bat_priv, @@ -1369,9 +1444,11 @@ static void batadv_iv_ogm_process(const struct ethhdr *ethhdr, if (router) { orig_node_tmp = router->orig_node; router_router = batadv_orig_node_get_router(orig_node_tmp); + router_ifinfo = batadv_neigh_ifinfo_get(router, + BATADV_IF_DEFAULT); }

- if ((router && router->bat_iv.tq_avg != 0) && + if ((router && router_ifinfo->bat_iv.tq_avg != 0) && (batadv_compare_eth(router->addr, ethhdr->h_source))) is_from_best_next_hop = true;

@@ -1417,7 +1494,8 @@ static void batadv_iv_ogm_process(const struct ethhdr *ethhdr, }

is_bidirect = batadv_iv_ogm_calc_tq(orig_node, orig_neigh_node, - batadv_ogm_packet, if_incoming); + batadv_ogm_packet, if_incoming, + BATADV_IF_DEFAULT);

/* update ranking if it is not a duplicate or has the same * seqno and similar ttl as the non-duplicate @@ -1428,7 +1506,8 @@ static void batadv_iv_ogm_process(const struct ethhdr *ethhdr, (sameseq && similar_ttl))) batadv_iv_ogm_orig_update(bat_priv, orig_node, ethhdr, batadv_ogm_packet, if_incoming, - tt_buff, dup_status); + BATADV_IF_DEFAULT, tt_buff, + dup_status);

/* is single hop (direct) neighbor */ if (is_single_hop_neigh) { @@ -1524,6 +1603,34 @@ static int batadv_iv_ogm_receive(struct sk_buff *skb, return NET_RX_SUCCESS; }

+/* batadv_iv_ogm_orig_print_neigh - print neighbors for the originator table + * @orig_node: the orig_node for which the neighbors are printed + * @if_outgoing: outgoing interface for these entries + * @seq: debugfs table seq_file struct + * + * Must be called while holding an rcu lock. + */ +static void +batadv_iv_ogm_orig_print_neigh(struct batadv_orig_node *orig_node, + struct batadv_hard_iface *if_outgoing, + struct seq_file *seq) +{ + struct batadv_neigh_node *neigh_node; + struct batadv_neigh_ifinfo *n_ifinfo; + + hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { + n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); + if (!n_ifinfo) + continue; + + seq_printf(seq, " %pM (%3i)", + neigh_node->addr, + n_ifinfo->bat_iv.tq_avg); + + batadv_neigh_ifinfo_free_ref(n_ifinfo); + } +} + /** * batadv_iv_ogm_orig_print - print the originator table * @bat_priv: the bat priv with all the soft interface information @@ -1532,10 +1639,11 @@ static int batadv_iv_ogm_receive(struct sk_buff *skb, static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv, struct seq_file *seq) { - struct batadv_neigh_node *neigh_node, *neigh_node_tmp; + struct batadv_neigh_node *neigh_node; struct batadv_hashtable *hash = bat_priv->orig_hash; int last_seen_msecs, last_seen_secs; struct batadv_orig_node *orig_node; + struct batadv_neigh_ifinfo *n_ifinfo; unsigned long last_seen_jiffies; struct hlist_head *head; int batman_count = 0; @@ -1554,7 +1662,12 @@ static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv, if (!neigh_node) continue;

- if (neigh_node->bat_iv.tq_avg == 0) + n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, + BATADV_IF_DEFAULT); + if (!n_ifinfo) + goto next; + + if (n_ifinfo->bat_iv.tq_avg == 0) goto next;

last_seen_jiffies = jiffies - orig_node->last_seen; @@ -1564,22 +1677,19 @@ static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv,

seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:", orig_node->orig, last_seen_secs, - last_seen_msecs, neigh_node->bat_iv.tq_avg, + last_seen_msecs, n_ifinfo->bat_iv.tq_avg, neigh_node->addr, neigh_node->if_incoming->net_dev->name);

- hlist_for_each_entry_rcu(neigh_node_tmp, - &orig_node->neigh_list, list) { - seq_printf(seq, " %pM (%3i)", - neigh_node_tmp->addr, - neigh_node_tmp->bat_iv.tq_avg); - } - + batadv_iv_ogm_orig_print_neigh(orig_node, + BATADV_IF_DEFAULT, seq); seq_puts(seq, "\n"); batman_count++;

next: batadv_neigh_node_free_ref(neigh_node); + if (n_ifinfo) + batadv_neigh_ifinfo_free_ref(n_ifinfo); } rcu_read_unlock(); } @@ -1591,37 +1701,84 @@ next: /** * batadv_iv_ogm_neigh_cmp - compare the metrics of two neighbors * @neigh1: the first neighbor object of the comparison + * @if_outgoing1: outgoing interface for the first neighbor * @neigh2: the second neighbor object of the comparison + * @if_outgoing2: outgoing interface for the second neighbor * * Returns a value less, equal to or greater than 0 if the metric via neigh1 is * lower, the same as or higher than the metric via neigh2 */ static int batadv_iv_ogm_neigh_cmp(struct batadv_neigh_node *neigh1, - struct batadv_neigh_node *neigh2) + struct batadv_hard_iface *if_outgoing1, + struct batadv_neigh_node *neigh2, + struct batadv_hard_iface *if_outgoing2) { + struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; uint8_t tq1, tq2; + int diff; + + neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); + neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2);

- tq1 = neigh1->bat_iv.tq_avg; - tq2 = neigh2->bat_iv.tq_avg; + if (!neigh1_ifinfo || !neigh2_ifinfo) { + diff = 0; + goto out; + }

- return tq1 - tq2; + tq1 = neigh1_ifinfo->bat_iv.tq_avg; + tq2 = neigh2_ifinfo->bat_iv.tq_avg; + diff = tq1 - tq2; + +out: + if (neigh1_ifinfo) + batadv_neigh_ifinfo_free_ref(neigh1_ifinfo); + if (neigh2_ifinfo) + batadv_neigh_ifinfo_free_ref(neigh2_ifinfo); + + return diff; }

/** * batadv_iv_ogm_neigh_is_eob - check if neigh1 is equally good or better than * neigh2 from the metric prospective * @neigh1: the first neighbor object of the comparison + * @if_outgoing: outgoing interface for the first neighbor * @neigh2: the second neighbor object of the comparison - * - * Returns true if the metric via neigh1 is equally good or better than the - * metric via neigh2, false otherwise. + * @if_outgoing2: outgoing interface for the second neighbor + + * Returns true if the metric via neigh1 is equally good or better than + * the metric via neigh2, false otherwise. */ -static bool batadv_iv_ogm_neigh_is_eob(struct batadv_neigh_node *neigh1, - struct batadv_neigh_node *neigh2) +static bool +batadv_iv_ogm_neigh_is_eob(struct batadv_neigh_node *neigh1, + struct batadv_hard_iface *if_outgoing1, + struct batadv_neigh_node *neigh2, + struct batadv_hard_iface *if_outgoing2) { - int diff = batadv_iv_ogm_neigh_cmp(neigh1, neigh2); + struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; + uint8_t tq1, tq2; + bool ret;

- return diff > -BATADV_TQ_SIMILARITY_THRESHOLD; + neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); + neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); + + /* we can't say that the metric is better */ + if (!neigh1_ifinfo || !neigh2_ifinfo) { + ret = false; + goto out; + } + + tq1 = neigh1_ifinfo->bat_iv.tq_avg; + tq2 = neigh2_ifinfo->bat_iv.tq_avg; + ret = (tq1 - tq2) > -BATADV_TQ_SIMILARITY_THRESHOLD; + +out: + if (neigh1_ifinfo) + batadv_neigh_ifinfo_free_ref(neigh1_ifinfo); + if (neigh2_ifinfo) + batadv_neigh_ifinfo_free_ref(neigh2_ifinfo); + + return ret; }

static struct batadv_algo_ops batadv_batman_iv __read_mostly = { diff --git a/compat.c b/compat.c index 4000d17..cebd800 100644 --- a/compat.c +++ b/compat.c @@ -57,14 +57,6 @@ void batadv_free_rcu_gw_node(struct rcu_head *rcu) kfree(gw_node); }

-void batadv_free_rcu_neigh_node(struct rcu_head *rcu) -{ - struct batadv_neigh_node *neigh_node; - - neigh_node = container_of(rcu, struct batadv_neigh_node, rcu); - kfree(neigh_node); -} - void batadv_free_rcu_tt_local_entry(struct rcu_head *rcu) { struct batadv_tt_common_entry *tt_common_entry; diff --git a/compat.h b/compat.h index 682da28..a050bb8 100644 --- a/compat.h +++ b/compat.h @@ -186,7 +186,6 @@ void batadv_free_rcu_orig_vlan(struct rcu_head *rcu); void batadv_free_rcu_softif_vlan(struct rcu_head *rcu); void batadv_free_rcu_tt_global_entry(struct rcu_head *rcu); void batadv_free_rcu_gw_node(struct rcu_head *rcu); -void batadv_free_rcu_neigh_node(struct rcu_head *rcu); void batadv_free_rcu_tt_local_entry(struct rcu_head *rcu); void batadv_free_rcu_backbone_gw(struct rcu_head *rcu); void batadv_free_rcu_dat_entry(struct rcu_head *rcu); diff --git a/gateway_client.c b/gateway_client.c index b6386c1..330819a 100644 --- a/gateway_client.c +++ b/gateway_client.c @@ -126,6 +126,7 @@ static struct batadv_gw_node * batadv_gw_get_best_gw_node(struct batadv_priv *bat_priv) { struct batadv_neigh_node *router; + struct batadv_neigh_ifinfo *router_ifinfo; struct batadv_gw_node *gw_node, *curr_gw = NULL; uint32_t max_gw_factor = 0, tmp_gw_factor = 0; uint32_t gw_divisor; @@ -146,10 +147,15 @@ batadv_gw_get_best_gw_node(struct batadv_priv *bat_priv) if (!router) continue;

+ router_ifinfo = batadv_neigh_ifinfo_get(router, + BATADV_IF_DEFAULT); + if (!router_ifinfo) + goto next; + if (!atomic_inc_not_zero(&gw_node->refcount)) goto next;

- tq_avg = router->bat_iv.tq_avg; + tq_avg = router_ifinfo->bat_iv.tq_avg;

switch (atomic_read(&bat_priv->gw_sel_class)) { case 1: /* fast connection */ @@ -194,6 +200,8 @@ batadv_gw_get_best_gw_node(struct batadv_priv *bat_priv)

next: batadv_neigh_node_free_ref(router); + if (router_ifinfo) + batadv_neigh_ifinfo_free_ref(router_ifinfo); } rcu_read_unlock();

@@ -236,6 +244,7 @@ void batadv_gw_election(struct batadv_priv *bat_priv) { struct batadv_gw_node *curr_gw = NULL, *next_gw = NULL; struct batadv_neigh_node *router = NULL; + struct batadv_neigh_ifinfo *router_ifinfo = NULL; char gw_addr[18] = { '\0' };

if (atomic_read(&bat_priv->gw_mode) != BATADV_GW_MODE_CLIENT) @@ -259,6 +268,13 @@ void batadv_gw_election(struct batadv_priv *bat_priv) batadv_gw_reselect(bat_priv); goto out; } + + router_ifinfo = batadv_neigh_ifinfo_get(router, + BATADV_IF_DEFAULT); + if (!router_ifinfo) { + batadv_gw_reselect(bat_priv); + goto out; + } }

if ((curr_gw) && (!next_gw)) { @@ -273,7 +289,8 @@ void batadv_gw_election(struct batadv_priv *bat_priv) next_gw->bandwidth_down / 10, next_gw->bandwidth_down % 10, next_gw->bandwidth_up / 10, - next_gw->bandwidth_up % 10, router->bat_iv.tq_avg); + next_gw->bandwidth_up % 10, + router_ifinfo->bat_iv.tq_avg); batadv_throw_uevent(bat_priv, BATADV_UEV_GW, BATADV_UEV_ADD, gw_addr); } else { @@ -283,7 +300,8 @@ void batadv_gw_election(struct batadv_priv *bat_priv) next_gw->bandwidth_down / 10, next_gw->bandwidth_down % 10, next_gw->bandwidth_up / 10, - next_gw->bandwidth_up % 10, router->bat_iv.tq_avg); + next_gw->bandwidth_up % 10, + router_ifinfo->bat_iv.tq_avg); batadv_throw_uevent(bat_priv, BATADV_UEV_GW, BATADV_UEV_CHANGE, gw_addr); } @@ -297,11 +315,15 @@ out: batadv_gw_node_free_ref(next_gw); if (router) batadv_neigh_node_free_ref(router); + if (router_ifinfo) + batadv_neigh_ifinfo_free_ref(router_ifinfo); }

void batadv_gw_check_election(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node) { + struct batadv_neigh_ifinfo *router_orig_tq = NULL; + struct batadv_neigh_ifinfo *router_gw_tq = NULL; struct batadv_orig_node *curr_gw_orig; struct batadv_neigh_node *router_gw = NULL, *router_orig = NULL; uint8_t gw_tq_avg, orig_tq_avg; @@ -314,6 +336,11 @@ void batadv_gw_check_election(struct batadv_priv *bat_priv, if (!router_gw) goto reselect;

+ router_gw_tq = batadv_neigh_ifinfo_get(router_gw, + BATADV_IF_DEFAULT); + if (!router_gw_tq) + goto reselect; + /* this node already is the gateway */ if (curr_gw_orig == orig_node) goto out; @@ -322,8 +349,13 @@ void batadv_gw_check_election(struct batadv_priv *bat_priv, if (!router_orig) goto out;

- gw_tq_avg = router_gw->bat_iv.tq_avg; - orig_tq_avg = router_orig->bat_iv.tq_avg; + router_orig_tq = batadv_neigh_ifinfo_get(router_orig, + BATADV_IF_DEFAULT); + if (!router_orig_tq) + goto out; + + gw_tq_avg = router_gw_tq->bat_iv.tq_avg; + orig_tq_avg = router_orig_tq->bat_iv.tq_avg;

/* the TQ value has to be better */ if (orig_tq_avg < gw_tq_avg) @@ -349,6 +381,10 @@ out: batadv_neigh_node_free_ref(router_gw); if (router_orig) batadv_neigh_node_free_ref(router_orig); + if (router_gw_tq) + batadv_neigh_ifinfo_free_ref(router_gw_tq); + if (router_orig_tq) + batadv_neigh_ifinfo_free_ref(router_orig_tq);

return; } @@ -534,28 +570,36 @@ static int batadv_write_buffer_text(struct batadv_priv *bat_priv, { struct batadv_gw_node *curr_gw; struct batadv_neigh_node *router; + struct batadv_neigh_ifinfo *router_ifinfo = NULL; int ret = -1;

router = batadv_orig_node_get_router(gw_node->orig_node); if (!router) goto out;

+ router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT); + if (!router_ifinfo) + goto out; + curr_gw = batadv_gw_get_selected_gw_node(bat_priv);

ret = seq_printf(seq, "%s %pM (%3i) %pM [%10s]: %u.%u/%u.%u MBit\n", (curr_gw == gw_node ? "=>" : " "), gw_node->orig_node->orig, - router->bat_iv.tq_avg, router->addr, + router_ifinfo->bat_iv.tq_avg, router->addr, router->if_incoming->net_dev->name, gw_node->bandwidth_down / 10, gw_node->bandwidth_down % 10, gw_node->bandwidth_up / 10, gw_node->bandwidth_up % 10);

- batadv_neigh_node_free_ref(router); if (curr_gw) batadv_gw_node_free_ref(curr_gw); out: + if (router_ifinfo) + batadv_neigh_ifinfo_free_ref(router_ifinfo); + if (router) + batadv_neigh_node_free_ref(router); return ret; }

@@ -743,6 +787,7 @@ bool batadv_gw_out_of_range(struct batadv_priv *bat_priv, struct batadv_neigh_node *neigh_curr = NULL, *neigh_old = NULL; struct batadv_orig_node *orig_dst_node = NULL; struct batadv_gw_node *gw_node = NULL, *curr_gw = NULL; + struct batadv_neigh_ifinfo *curr_ifinfo, *old_ifinfo; struct ethhdr *ethhdr = (struct ethhdr *)skb->data; bool out_of_range = false; uint8_t curr_tq_avg; @@ -784,7 +829,14 @@ bool batadv_gw_out_of_range(struct batadv_priv *bat_priv, if (!neigh_curr) goto out;

- curr_tq_avg = neigh_curr->bat_iv.tq_avg; + curr_ifinfo = batadv_neigh_ifinfo_get(neigh_curr, + BATADV_IF_DEFAULT); + if (!curr_ifinfo) + goto out; + + curr_tq_avg = curr_ifinfo->bat_iv.tq_avg; + batadv_neigh_ifinfo_free_ref(curr_ifinfo); + break; case BATADV_GW_MODE_OFF: default: @@ -795,8 +847,13 @@ bool batadv_gw_out_of_range(struct batadv_priv *bat_priv, if (!neigh_old) goto out;

- if (curr_tq_avg - neigh_old->bat_iv.tq_avg > BATADV_GW_THRESHOLD) + old_ifinfo = batadv_neigh_ifinfo_get(neigh_old, BATADV_IF_DEFAULT); + if (!old_ifinfo) + goto out; + + if ((curr_tq_avg - old_ifinfo->bat_iv.tq_avg) > BATADV_GW_THRESHOLD) out_of_range = true; + batadv_neigh_ifinfo_free_ref(old_ifinfo);

out: if (orig_dst_node) diff --git a/hard-interface.h b/hard-interface.h index 9f23f16..2017e9f 100644 --- a/hard-interface.h +++ b/hard-interface.h @@ -48,6 +48,11 @@ int batadv_hardif_min_mtu(struct net_device *soft_iface); void batadv_update_min_mtu(struct net_device *soft_iface); void batadv_hardif_free_rcu(struct rcu_head *rcu);

+/** + * batadv_hardif_free_ref - decrement the hard interface refcounter and + * possibly free it + * @hard_iface: the hard interface to free + */ static inline void batadv_hardif_free_ref(struct batadv_hard_iface *hard_iface) { @@ -55,6 +60,18 @@ batadv_hardif_free_ref(struct batadv_hard_iface *hard_iface) call_rcu(&hard_iface->rcu, batadv_hardif_free_rcu); }

+/** + * batadv_hardif_free_ref_now - decrement the hard interface refcounter and + * possibly free it (without rcu callback) + * @hard_iface: the hard interface to free + */ +static inline void +batadv_hardif_free_ref_now(struct batadv_hard_iface *hard_iface) +{ + if (atomic_dec_and_test(&hard_iface->refcount)) + batadv_hardif_free_rcu(&hard_iface->rcu); +} + static inline struct batadv_hard_iface * batadv_primary_if_get_selected(struct batadv_priv *bat_priv) { diff --git a/main.h b/main.h index e456762..09cdebb 100644 --- a/main.h +++ b/main.h @@ -69,6 +69,11 @@

#define BATADV_NO_MARK 0

+/* default interface for multi interface operation. The default interface is + * used for communication which originated locally (i.e. is not forwarded) + * or where special forwarding is not desired/necessary. */ +#define BATADV_IF_DEFAULT ((struct batadv_hard_iface *)NULL) + #define BATADV_NUM_WORDS BITS_TO_LONGS(BATADV_TQ_LOCAL_WINDOW_SIZE)

#define BATADV_LOG_BUF_LEN 8192 /* has to be a power of 2 */ diff --git a/originator.c b/originator.c index d4976f4..a6156e8 100644 --- a/originator.c +++ b/originator.c @@ -145,10 +145,87 @@ err: return -ENOMEM; }

+/** + * batadv_neigh_ifinfo_free_rcu - free the neigh_ifinfo object + * @rcu: rcu pointer of the neigh_ifinfo object + */ +static void batadv_neigh_ifinfo_free_rcu(struct rcu_head *rcu) +{ + struct batadv_neigh_ifinfo *neigh_ifinfo; + + neigh_ifinfo = container_of(rcu, struct batadv_neigh_ifinfo, rcu); + + if (neigh_ifinfo->if_outgoing != BATADV_IF_DEFAULT) + batadv_hardif_free_ref_now(neigh_ifinfo->if_outgoing); + + kfree(neigh_ifinfo); +} + +/** + * batadv_neigh_ifinfo_free_now - decrement the refcounter and possibly free + * the neigh_ifinfo (without rcu callback) + * @neigh_ifinfo: the neigh_ifinfo object to release + */ +static void +batadv_neigh_ifinfo_free_ref_now(struct batadv_neigh_ifinfo *neigh_ifinfo) +{ + if (atomic_dec_and_test(&neigh_ifinfo->refcount)) + batadv_neigh_ifinfo_free_rcu(&neigh_ifinfo->rcu); +} + +/** + * batadv_neigh_ifinfo_free_ref - decrement the refcounter and possibly free + * the neigh_ifinfo + * @neigh_ifinfo: the neigh_ifinfo object to release + */ +void batadv_neigh_ifinfo_free_ref(struct batadv_neigh_ifinfo *neigh_ifinfo) +{ + if (atomic_dec_and_test(&neigh_ifinfo->refcount)) + call_rcu(&neigh_ifinfo->rcu, batadv_neigh_ifinfo_free_rcu); +} + +/** + * batadv_neigh_node_free_rcu - free the neigh_node + * @rcu: rcu pointer of the neigh_node + */ +static void batadv_neigh_node_free_rcu(struct rcu_head *rcu) +{ + struct hlist_node *node_tmp; + struct batadv_neigh_node *neigh_node; + struct batadv_neigh_ifinfo *neigh_ifinfo; + + neigh_node = container_of(rcu, struct batadv_neigh_node, rcu); + + hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, + &neigh_node->ifinfo_list, list) { + batadv_neigh_ifinfo_free_ref_now(neigh_ifinfo); + } + batadv_hardif_free_ref_now(neigh_node->if_incoming); + + kfree(neigh_node); +} + +/** + * batadv_neigh_node_free_ref_now - decrement the neighbors refcounter + * and possibly free it (without rcu callback) + * @neigh_node: neigh neighbor to free + */ +static void +batadv_neigh_node_free_ref_now(struct batadv_neigh_node *neigh_node) +{ + if (atomic_dec_and_test(&neigh_node->refcount)) + batadv_neigh_node_free_rcu(&neigh_node->rcu); +} + +/** + * batadv_neigh_node_free_ref - decrement the neighbors refcounter + * and possibly free it + * @neigh_node: neigh neighbor to free + */ void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node) { if (atomic_dec_and_test(&neigh_node->refcount)) - kfree_rcu(neigh_node, rcu); + call_rcu(&neigh_node->rcu, batadv_neigh_node_free_rcu); }

/* increases the refcounter of a found router */ @@ -168,6 +245,84 @@ batadv_orig_node_get_router(struct batadv_orig_node *orig_node) }

/** + * batadv_neigh_ifinfo_get - find the ifinfo from an neigh_node + * @neigh_node: the neigh node to be queried + * @if_outgoing: the interface for which the ifinfo should be acquired + * + * The object is returned with refcounter increased by 1. + * + * Returns the requested neigh_ifinfo or NULL if not found + */ +struct batadv_neigh_ifinfo * +batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh, + struct batadv_hard_iface *if_outgoing) +{ + struct batadv_neigh_ifinfo *neigh_ifinfo = NULL, + *tmp_neigh_ifinfo; + + rcu_read_lock(); + hlist_for_each_entry_rcu(tmp_neigh_ifinfo, &neigh->ifinfo_list, + list) { + if (tmp_neigh_ifinfo->if_outgoing != if_outgoing) + continue; + + if (!atomic_inc_not_zero(&tmp_neigh_ifinfo->refcount)) + continue; + + neigh_ifinfo = tmp_neigh_ifinfo; + break; + } + rcu_read_unlock(); + + return neigh_ifinfo; +} + +/** + * batadv_neigh_ifinfo_new - search and possibly create an neigh_ifinfo object + * @neigh_node: the neigh node to be queried + * @if_outgoing: the interface for which the ifinfo should be acquired + * + * Returns NULL in case of failure or the neigh_ifinfo object for the + * if_outgoing interface otherwise. The object is created and added to the list + * if it does not exist. + * + * The object is returned with refcounter increased by 1. + */ +struct batadv_neigh_ifinfo * +batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh, + struct batadv_hard_iface *if_outgoing) +{ + struct batadv_neigh_ifinfo *neigh_ifinfo; + + spin_lock_bh(&neigh->ifinfo_lock); + + neigh_ifinfo = batadv_neigh_ifinfo_get(neigh, if_outgoing); + if (neigh_ifinfo) + goto out; + + neigh_ifinfo = kzalloc(sizeof(*neigh_ifinfo), GFP_ATOMIC); + if (!neigh_ifinfo) + goto out; + + if (if_outgoing && !atomic_inc_not_zero(&if_outgoing->refcount)) { + kfree(neigh_ifinfo); + neigh_ifinfo = NULL; + goto out; + } + + INIT_HLIST_NODE(&neigh_ifinfo->list); + atomic_set(&neigh_ifinfo->refcount, 2); + neigh_ifinfo->if_outgoing = if_outgoing; + + hlist_add_head_rcu(&neigh_ifinfo->list, &neigh->ifinfo_list); + +out: + spin_unlock_bh(&neigh->ifinfo_lock); + + return neigh_ifinfo; +} + +/** * batadv_neigh_node_new - create and init a new neigh_node object * @hard_iface: the interface where the neighbour is connected to * @neigh_addr: the mac address of the neighbour interface @@ -188,6 +343,8 @@ batadv_neigh_node_new(struct batadv_hard_iface *hard_iface, goto out;

INIT_HLIST_NODE(&neigh_node->list); + INIT_HLIST_HEAD(&neigh_node->ifinfo_list); + spin_lock_init(&neigh_node->ifinfo_lock);

memcpy(neigh_node->addr, neigh_addr, ETH_ALEN); neigh_node->if_incoming = hard_iface; @@ -214,7 +371,7 @@ static void batadv_orig_node_free_rcu(struct rcu_head *rcu) hlist_for_each_entry_safe(neigh_node, node_tmp, &orig_node->neigh_list, list) { hlist_del_rcu(&neigh_node->list); - batadv_neigh_node_free_ref(neigh_node); + batadv_neigh_node_free_ref_now(neigh_node); }

spin_unlock_bh(&orig_node->neigh_list_lock); @@ -359,20 +516,23 @@ free_orig_node: return NULL; }

+/** + * batadv_purge_orig_neighbors - purges neighbors from originator + * @bat_priv: the bat priv with all the soft interface information + * @orig_node: orig node which is to be checked + * + * Returns true if any neighbor was purged, false otherwise + */ static bool batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, - struct batadv_orig_node *orig_node, - struct batadv_neigh_node **best_neigh) + struct batadv_orig_node *orig_node) { - struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; struct hlist_node *node_tmp; struct batadv_neigh_node *neigh_node; bool neigh_purged = false; unsigned long last_seen; struct batadv_hard_iface *if_incoming;

- *best_neigh = NULL; - spin_lock_bh(&orig_node->neigh_list_lock);

/* for all neighbors towards this originator ... */ @@ -402,13 +562,6 @@ batadv_purge_orig_neighbors(struct batadv_priv *bat_priv,

hlist_del_rcu(&neigh_node->list); batadv_neigh_node_free_ref(neigh_node); - } else { - /* store the best_neighbour if this is the first - * iteration or if a better neighbor has been found - */ - if (!*best_neigh || - bao->bat_neigh_cmp(neigh_node, *best_neigh) > 0) - *best_neigh = neigh_node; } }

@@ -416,6 +569,36 @@ batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, return neigh_purged; }

+/** + * batadv_find_best_neighbor - finds the best neighbor after purging + * @bat_priv: the bat priv with all the soft interface information + * @orig_node: orig node which is to be checked + * @if_outgoing: the interface for which the metric should be compared + * + * Returns the current best neighbor, with refcount increased. + */ +static struct batadv_neigh_node * +batadv_find_best_neighbor(struct batadv_priv *bat_priv, + struct batadv_orig_node *orig_node, + struct batadv_hard_iface *if_outgoing) +{ + struct batadv_neigh_node *best = NULL, *neigh; + struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; + + rcu_read_lock(); + hlist_for_each_entry_rcu(neigh, &orig_node->neigh_list, list) + if (!best || + (bao->bat_neigh_cmp(neigh, if_outgoing, + best, if_outgoing) <= 0)) + best = neigh; + + if (!atomic_inc_not_zero(&best->refcount)) + best = NULL; + rcu_read_unlock(); + + return best; +} + static bool batadv_purge_orig_node(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node) { @@ -428,12 +611,15 @@ static bool batadv_purge_orig_node(struct batadv_priv *bat_priv, orig_node->orig, jiffies_to_msecs(orig_node->last_seen)); return true; - } else { - if (batadv_purge_orig_neighbors(bat_priv, orig_node, - &best_neigh_node)) - batadv_update_route(bat_priv, orig_node, - best_neigh_node); } + if (!batadv_purge_orig_neighbors(bat_priv, orig_node)) + return false; + + best_neigh_node = batadv_find_best_neighbor(bat_priv, orig_node, + BATADV_IF_DEFAULT); + batadv_update_route(bat_priv, orig_node, best_neigh_node); + if (best_neigh_node) + batadv_neigh_node_free_ref(best_neigh_node);

return false; } diff --git a/originator.h b/originator.h index ba0e130..bccc0b0 100644 --- a/originator.h +++ b/originator.h @@ -32,6 +32,13 @@ batadv_neigh_node_new(struct batadv_hard_iface *hard_iface, void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node); struct batadv_neigh_node * batadv_orig_node_get_router(struct batadv_orig_node *orig_node); +struct batadv_neigh_ifinfo * +batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh, + struct batadv_hard_iface *if_outgoing); +struct batadv_neigh_ifinfo * +batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh, + struct batadv_hard_iface *if_outgoing); +void batadv_neigh_ifinfo_free_ref(struct batadv_neigh_ifinfo *neigh_ifinfo); int batadv_orig_seq_print_text(struct seq_file *seq, void *offset); int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, int max_if_num); diff --git a/translation-table.c b/translation-table.c index f9a1fb4..dab4fd6 100644 --- a/translation-table.c +++ b/translation-table.c @@ -1401,7 +1401,8 @@ batadv_transtable_best_orig(struct batadv_priv *bat_priv, continue;

if (best_router && - bao->bat_neigh_cmp(router, best_router) <= 0) { + bao->bat_neigh_cmp(router, BATADV_IF_DEFAULT, + best_router, BATADV_IF_DEFAULT) <= 0) { batadv_neigh_node_free_ref(router); continue; } diff --git a/types.h b/types.h index 086b452..558ecf4 100644 --- a/types.h +++ b/types.h @@ -286,47 +286,62 @@ struct batadv_gw_node { };

/** - * struct batadv_neigh_bat_iv - B.A.T.M.A.N. IV specific structure for single - * hop neighbors + * struct batadv_neigh_node - structure for single hops neighbors + * @list: list node for batadv_orig_node::neigh_list + * @orig_node: pointer to corresponding orig_node + * @addr: the MAC address of the neighboring interface + * @ifinfo_list: list for routing metrics per outgoing interface + * @ifinfo_lock: lock protecting private ifinfo members and list + * @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 + * @rcu: struct used for freeing in an RCU-safe manner + * @bat_iv: B.A.T.M.A.N. IV private structure + */ +struct batadv_neigh_node { + struct hlist_node list; + struct batadv_orig_node *orig_node; + uint8_t addr[ETH_ALEN]; + struct hlist_head ifinfo_list; + spinlock_t ifinfo_lock; /* protects ifinfo_list and its members */ + struct batadv_hard_iface *if_incoming; + unsigned long last_seen; + atomic_t refcount; + struct rcu_head rcu; +}; + +/* struct batadv_neigh_node_bat_iv - neighbor information per outgoing + * interface for BATMAN IV * @tq_recv: ring buffer of received TQ values from this neigh node * @tq_index: ring buffer index * @tq_avg: averaged tq of all tq values in the ring buffer (tq_recv) * @real_bits: bitfield containing the number of OGMs received from this neigh * node (relative to orig_node->last_real_seqno) * @real_packet_count: counted result of real_bits - * @lq_update_lock: lock protecting tq_recv & tq_index */ -struct batadv_neigh_bat_iv { +struct batadv_neigh_ifinfo_bat_iv { uint8_t tq_recv[BATADV_TQ_GLOBAL_WINDOW_SIZE]; uint8_t tq_index; uint8_t tq_avg; DECLARE_BITMAP(real_bits, BATADV_TQ_LOCAL_WINDOW_SIZE); uint8_t real_packet_count; - spinlock_t lq_update_lock; /* protects tq_recv & tq_index */ };

-/** - * struct batadv_neigh_node - structure for single hops neighbors - * @list: list node for batadv_orig_node::neigh_list - * @orig_node: pointer to corresponding orig_node - * @addr: the MAC address of the neighboring interface - * @if_incoming: pointer to incoming hard interface - * @last_seen: when last packet via this neighbor was received +/* struct batadv_neigh_ifinfo - neighbor information per outgoing interface + * @list: list node for batadv_neigh_node::ifinfo_list + * @if_outgoing: pointer to outgoing hard interface + * @bat_iv: B.A.T.M.A.N. IV private structure * @last_ttl: last received ttl from this neigh node * @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 + * @rcu: struct used for freeing in a RCU-safe manner */ -struct batadv_neigh_node { +struct batadv_neigh_ifinfo { struct hlist_node list; - struct batadv_orig_node *orig_node; - uint8_t addr[ETH_ALEN]; - struct batadv_hard_iface *if_incoming; - unsigned long last_seen; + struct batadv_hard_iface *if_outgoing; + struct batadv_neigh_ifinfo_bat_iv bat_iv; uint8_t last_ttl; atomic_t refcount; struct rcu_head rcu; - struct batadv_neigh_bat_iv bat_iv; };

/** @@ -1010,9 +1025,11 @@ struct batadv_forw_packet { * @bat_primary_iface_set: called when primary interface is selected / changed * @bat_ogm_schedule: prepare a new outgoing OGM for the send queue * @bat_ogm_emit: send scheduled OGM - * @bat_neigh_cmp: compare the metrics of two neighbors - * @bat_neigh_is_equiv_or_better: check if neigh1 is equally good or - * better than neigh2 from the metric prospective + * @bat_neigh_cmp: compare the metrics of two neighbors for their respective + * outgoing interfaces + * @bat_neigh_is_equiv_or_better: check if neigh1 is equally good or better + * than neigh2 for their respective outgoing interface from the metric + * prospective * @bat_orig_print: print the originator table (optional) * @bat_orig_free: free the resources allocated by the routing algorithm for an * orig_node object @@ -1031,9 +1048,14 @@ struct batadv_algo_ops { void (*bat_ogm_schedule)(struct batadv_hard_iface *hard_iface); void (*bat_ogm_emit)(struct batadv_forw_packet *forw_packet); int (*bat_neigh_cmp)(struct batadv_neigh_node *neigh1, - struct batadv_neigh_node *neigh2); - bool (*bat_neigh_is_equiv_or_better)(struct batadv_neigh_node *neigh1, - struct batadv_neigh_node *neigh2); + struct batadv_hard_iface *if_outgoing1, + struct batadv_neigh_node *neigh2, + struct batadv_hard_iface *if_outgoing2); + bool (*bat_neigh_is_equiv_or_better) + (struct batadv_neigh_node *neigh1, + struct batadv_hard_iface *if_outgoing1, + struct batadv_neigh_node *neigh2, + struct batadv_hard_iface *if_outgoing2); /* orig_node handling API */ void (*bat_orig_print)(struct batadv_priv *priv, struct seq_file *seq); void (*bat_orig_free)(struct batadv_orig_node *orig_node);