batman-adv: B.A.T.M.A.N. V - implement bat_neigh_print API

Lists all neighbours detected by the Echo Locating Protocol
(ELP) and their throughput metric.

Initially Developed by Linus during a 6 months trainee study
period in Ascom (Switzerland) AG.

Signed-off-by: Linus Luessing <linus.luessing@web.de>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>

diff --git a/net/batman-adv/bat_v.c b/net/batman-adv/bat_v.c
index a90117c9a861ea2c8ed14016e50c6a3e176ad4dc..3315b9a598af0f71a95a080d450cf1faf3a70a1d 100644 (file)
--- a/net/batman-adv/bat_v.c
+++ b/net/batman-adv/bat_v.c
@@ -117,6 +117,60 @@ batadv_v_orig_print_neigh(struct batadv_orig_node *orig_node,
        }
 }
 
+/**
+ * batadv_v_hardif_neigh_print - print a single ELP neighbour node
+ * @seq: neighbour table seq_file struct
+ * @hardif_neigh: hardif neighbour information
+ */
+static void
+batadv_v_hardif_neigh_print(struct seq_file *seq,
+                           struct batadv_hardif_neigh_node *hardif_neigh)
+{
+       int last_secs, last_msecs;
+       u32 throughput;
+
+       last_secs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) / 1000;
+       last_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) % 1000;
+       throughput = ewma_throughput_read(&hardif_neigh->bat_v.throughput);
+
+       seq_printf(seq, "%pM %4i.%03is (%9u.%1u) [%10s]\n",
+                  hardif_neigh->addr, last_secs, last_msecs, throughput / 10,
+                  throughput % 10, hardif_neigh->if_incoming->net_dev->name);
+}
+
+/**
+ * batadv_v_neigh_print - print the single hop neighbour list
+ * @bat_priv: the bat priv with all the soft interface information
+ * @seq: neighbour table seq_file struct
+ */
+static void batadv_v_neigh_print(struct batadv_priv *bat_priv,
+                                struct seq_file *seq)
+{
+       struct net_device *net_dev = (struct net_device *)seq->private;
+       struct batadv_hardif_neigh_node *hardif_neigh;
+       struct batadv_hard_iface *hard_iface;
+       int batman_count = 0;
+
+       seq_printf(seq, "  %-15s %s (%11s) [%10s]\n", "Neighbor",
+                  "last-seen", "throughput", "IF");
+
+       rcu_read_lock();
+       list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
+               if (hard_iface->soft_iface != net_dev)
+                       continue;
+
+               hlist_for_each_entry_rcu(hardif_neigh,
+                                        &hard_iface->neigh_list, list) {
+                       batadv_v_hardif_neigh_print(seq, hardif_neigh);
+                       batman_count++;
+               }
+       }
+       rcu_read_unlock();
+
+       if (batman_count == 0)
+               seq_puts(seq, "No batman nodes in range ...\n");
+}
+
 /**
  * batadv_v_orig_print - print the originator table
  * @bat_priv: the bat priv with all the soft interface information
@@ -230,6 +284,7 @@ static struct batadv_algo_ops batadv_batman_v __read_mostly = {
        .bat_orig_print = batadv_v_orig_print,
        .bat_neigh_cmp = batadv_v_neigh_cmp,
        .bat_neigh_is_similar_or_better = batadv_v_neigh_is_sob,
+       .bat_neigh_print = batadv_v_neigh_print,
 };
 
 /**