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>

3 files changed, 64 insertions, 0 deletions

diff --git a/net/batman-adv/bat_debugfs.c b/net/batman-adv/bat_debugfs.c
index 165ff62a2bed..0e3517773a8b 100644
--- a/net/batman-adv/bat_debugfs.c
+++ b/net/batman-adv/bat_debugfs.c
@@ -32,6 +32,7 @@
 #include "soft-interface.h"
 #include "vis.h"
 #include "icmp_socket.h"
+#include "bridge_loop_avoidance.h"
 
 static struct dentry *bat_debugfs;
 
@@ -244,6 +245,13 @@ static int transtable_global_open(struct inode *inode, struct file *file)
         return single_open(file, tt_global_seq_print_text, net_dev);
 }
 
+static int bla_claim_table_open(struct inode *inode, struct file *file)
+{
+        struct net_device *net_dev = (struct net_device *)inode->i_private;
+        return single_open(file, bla_claim_table_seq_print_text, net_dev);
+}
+
+
 static int transtable_local_open(struct inode *inode, struct file *file)
 {
         struct net_device *net_dev = (struct net_device *)inode->i_private;
@@ -277,6 +285,7 @@ static BAT_DEBUGINFO(routing_algos, S_IRUGO, bat_algorithms_open);
 static BAT_DEBUGINFO(originators, S_IRUGO, originators_open);
 static BAT_DEBUGINFO(gateways, S_IRUGO, gateways_open);
 static BAT_DEBUGINFO(transtable_global, S_IRUGO, transtable_global_open);
+static BAT_DEBUGINFO(bla_claim_table, S_IRUGO, bla_claim_table_open);
 static BAT_DEBUGINFO(transtable_local, S_IRUGO, transtable_local_open);
 static BAT_DEBUGINFO(vis_data, S_IRUGO, vis_data_open);
 
@@ -284,6 +293,7 @@ static struct bat_debuginfo *mesh_debuginfos[] = {
         &bat_debuginfo_originators,
         &bat_debuginfo_gateways,
         &bat_debuginfo_transtable_global,
+        &bat_debuginfo_bla_claim_table,
         &bat_debuginfo_transtable_local,
         &bat_debuginfo_vis_data,
         NULL,
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;
+}
diff --git a/net/batman-adv/bridge_loop_avoidance.h b/net/batman-adv/bridge_loop_avoidance.h
index 488d77895d01..d9e34803a465 100644
--- a/net/batman-adv/bridge_loop_avoidance.h
+++ b/net/batman-adv/bridge_loop_avoidance.h
@@ -26,6 +26,7 @@ int bla_rx(struct bat_priv *bat_priv, struct sk_buff *skb, short vid);
 int bla_tx(struct bat_priv *bat_priv, struct sk_buff *skb, short vid);
 int bla_is_backbone_gw(struct sk_buff *skb,
                        struct orig_node *orig_node, int hdr_size);
+int bla_claim_table_seq_print_text(struct seq_file *seq, void *offset);
 void bla_update_orig_address(struct bat_priv *bat_priv,
                              struct hard_iface *primary_if,
                              struct hard_iface *oldif);