batman-adv: export claim tables through debugfs

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>

1 files changed, 53 insertions, 0 deletions

diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c
index f84c892be7ea..56b9b4924763 100644
--- a/net/batman-adv/bridge_loop_avoidance.c
+++ b/net/batman-adv/bridge_loop_avoidance.c
@@ -1294,3 +1294,56 @@ out:
                 claim_free_ref(claim);
         return ret;
 }
+
+int bla_claim_table_seq_print_text(struct seq_file *seq, void *offset)
+{
+        struct net_device *net_dev = (struct net_device *)seq->private;
+        struct bat_priv *bat_priv = netdev_priv(net_dev);
+        struct hashtable_t *hash = bat_priv->claim_hash;
+        struct claim *claim;
+        struct hard_iface *primary_if;
+        struct hlist_node *node;
+        struct hlist_head *head;
+        uint32_t i;
+        bool is_own;
+        int ret = 0;
+
+        primary_if = primary_if_get_selected(bat_priv);
+        if (!primary_if) {
+                ret = seq_printf(seq,
+                                 "BATMAN mesh %s disabled - please specify interfaces to enable it\n",
+                                 net_dev->name);
+                goto out;
+        }
+
+        if (primary_if->if_status != IF_ACTIVE) {
+                ret = seq_printf(seq,
+                                 "BATMAN mesh %s disabled - primary interface not active\n",
+                                 net_dev->name);
+                goto out;
+        }
+
+        seq_printf(seq, "Claims announced for the mesh %s (orig %pM)\n",
+                   net_dev->name, primary_if->net_dev->dev_addr);
+        seq_printf(seq, "   %-17s    %-5s    %-17s [o] (%-4s)\n",
+                   "Client", "VID", "Originator", "CRC");
+        for (i = 0; i < hash->size; i++) {
+                head = &hash->table[i];
+
+                rcu_read_lock();
+                hlist_for_each_entry_rcu(claim, node, head, hash_entry) {
+                        is_own = compare_eth(claim->backbone_gw->orig,
+                                             primary_if->net_dev->dev_addr);
+                        seq_printf(seq, " * %pM on % 5d by %pM [%c] (%04x)\n",
+                                   claim->addr, claim->vid,
+                                   claim->backbone_gw->orig,
+                                   (is_own ? 'x' : ' '),
+                                   claim->backbone_gw->crc);
+                }
+                rcu_read_unlock();
+        }
+out:
+        if (primary_if)
+                hardif_free_ref(primary_if);
+        return ret;
+}