diff options
Diffstat (limited to 'net/batman-adv/bat_iv_ogm.c')
| -rw-r--r-- | net/batman-adv/bat_iv_ogm.c | 267 |
1 files changed, 212 insertions, 55 deletions
diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c index 48f5d35..157cc11 100644 --- a/net/batman-adv/bat_iv_ogm.c +++ b/net/batman-adv/bat_iv_ogm.c @@ -272,7 +272,14 @@ 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", @@ -895,15 +902,30 @@ 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; @@ -931,12 +953,21 @@ 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) { @@ -958,20 +989,23 @@ 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->ttl; - neigh_node->last_ttl = batadv_ogm_packet->ttl; + neigh_ifinfo->last_ttl = batadv_ogm_packet->ttl; } /* if this neighbor already is our next hop there is nothing @@ -981,14 +1015,23 @@ 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; @@ -1015,15 +1058,31 @@ 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; @@ -1068,7 +1127,13 @@ 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 % */ @@ -1132,17 +1197,20 @@ 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; @@ -1169,15 +1237,19 @@ 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; @@ -1188,13 +1260,14 @@ 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(); @@ -1221,6 +1294,7 @@ 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; @@ -1353,7 +1427,8 @@ 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, @@ -1372,9 +1447,11 @@ 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; @@ -1420,7 +1497,8 @@ 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 @@ -1431,7 +1509,8 @@ 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) { @@ -1527,6 +1606,34 @@ 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 @@ -1535,10 +1642,11 @@ 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; @@ -1557,7 +1665,12 @@ 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; @@ -1567,22 +1680,19 @@ 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(); } @@ -1594,37 +1704,84 @@ 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 = { |
