batman-adv: add debugfs support to view multiif tables

Show tables for the multi interface operation. Originator tables
are added per hard interface.

This patch also changes the API by adding the interface to the
bat_orig_print() parameters.
Signed-off-by: Simon Wunderlich <simon@open-mesh.com>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>

net/batman-adv/bat_iv_ogm.c

@@ -1777,9 +1777,11 @@ batadv_iv_ogm_orig_print_neigh(struct batadv_orig_node *orig_node,
  * batadv_iv_ogm_orig_print - print the originator table
  * @bat_priv: the bat priv with all the soft interface information
  * @seq: debugfs table seq_file struct
+ * @if_outgoing: the outgoing interface for which this should be printed
  */
 static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv,
-				     struct seq_file *seq)
+				     struct seq_file *seq,
+				     struct batadv_hard_iface *if_outgoing)
 {
 	struct batadv_neigh_node *neigh_node;
 	struct batadv_hashtable *hash = bat_priv->orig_hash;
@@ -1801,12 +1803,12 @@ static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv,
 		rcu_read_lock();
 		hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
 			neigh_node = batadv_orig_router_get(orig_node,
-							    BATADV_IF_DEFAULT);
+							    if_outgoing);
 			if (!neigh_node)
 				continue;
 
 			n_ifinfo = batadv_neigh_ifinfo_get(neigh_node,
-							   BATADV_IF_DEFAULT);
+							   if_outgoing);
 			if (!n_ifinfo)
 				goto next;
 
@@ -1824,8 +1826,8 @@ static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv,
 				   neigh_node->addr,
 				   neigh_node->if_incoming->net_dev->name);
 
-			batadv_iv_ogm_orig_print_neigh(orig_node,
-						       BATADV_IF_DEFAULT, seq);
+			batadv_iv_ogm_orig_print_neigh(orig_node, if_outgoing,
+						       seq);
 			seq_puts(seq, "\n");
 			batman_count++;
 

net/batman-adv/debugfs.c

@@ -248,6 +248,19 @@ static int batadv_originators_open(struct inode *inode, struct file *file)
 	return single_open(file, batadv_orig_seq_print_text, net_dev);
 }
 
+/**
+ * batadv_originators_hardif_open - handles debugfs output for the
+ *  originator table of an hard interface
+ * @inode: inode pointer to debugfs file
+ * @file: pointer to the seq_file
+ */
+static int batadv_originators_hardif_open(struct inode *inode,
+					  struct file *file)
+{
+	struct net_device *net_dev = (struct net_device *)inode->i_private;
+	return single_open(file, batadv_orig_hardif_seq_print_text, net_dev);
+}
+
 static int batadv_gateways_open(struct inode *inode, struct file *file)
 {
 	struct net_device *net_dev = (struct net_device *)inode->i_private;
@@ -383,8 +396,11 @@ struct batadv_debuginfo batadv_hardif_debuginfo_##_name = {	\
 		.release = single_release,			\
 	},							\
 };
+static BATADV_HARDIF_DEBUGINFO(originators, S_IRUGO,
+			       batadv_originators_hardif_open);
 
 static struct batadv_debuginfo *batadv_hardif_debuginfos[] = {
+	&batadv_hardif_debuginfo_originators,
 	NULL,
 };
 

net/batman-adv/originator.c

@@ -940,11 +940,57 @@ int batadv_orig_seq_print_text(struct seq_file *seq, void *offset)
 		return 0;
 	}
 
-	bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq);
+	bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq,
+					       BATADV_IF_DEFAULT);
 
 	return 0;
 }
 
+/**
+ * batadv_orig_hardif_seq_print_text - writes originator infos for a specific
+ *  outgoing interface
+ * @seq: debugfs table seq_file struct
+ * @offset: not used
+ *
+ * Returns 0
+ */
+int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset)
+{
+	struct net_device *net_dev = (struct net_device *)seq->private;
+	struct batadv_hard_iface *hard_iface;
+	struct batadv_priv *bat_priv;
+
+	hard_iface = batadv_hardif_get_by_netdev(net_dev);
+
+	if (!hard_iface || !hard_iface->soft_iface) {
+		seq_puts(seq, "Interface not known to B.A.T.M.A.N.\n");
+		goto out;
+	}
+
+	bat_priv = netdev_priv(hard_iface->soft_iface);
+	if (!bat_priv->bat_algo_ops->bat_orig_print) {
+		seq_puts(seq,
+			 "No printing function for this routing protocol\n");
+		goto out;
+	}
+
+	if (hard_iface->if_status != BATADV_IF_ACTIVE) {
+		seq_puts(seq, "Interface not active\n");
+		goto out;
+	}
+
+	seq_printf(seq, "[B.A.T.M.A.N. adv %s, IF/MAC: %s/%pM (%s %s)]\n",
+		   BATADV_SOURCE_VERSION, hard_iface->net_dev->name,
+		   hard_iface->net_dev->dev_addr,
+		   hard_iface->soft_iface->name, bat_priv->bat_algo_ops->name);
+
+	bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, hard_iface);
+
+out:
+	batadv_hardif_free_ref(hard_iface);
+	return 0;
+}
+
 int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface,
 			    int max_if_num)
 {

net/batman-adv/originator.h

@@ -53,6 +53,7 @@ batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node,
 void batadv_orig_ifinfo_free_ref(struct batadv_orig_ifinfo *orig_ifinfo);
 
 int batadv_orig_seq_print_text(struct seq_file *seq, void *offset);
+int batadv_orig_hardif_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);
 int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface,

net/batman-adv/types.h

@@ -1083,7 +1083,8 @@ struct batadv_algo_ops {
 		 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_print)(struct batadv_priv *priv, struct seq_file *seq,
+			       struct batadv_hard_iface *hard_iface);
 	void (*bat_orig_free)(struct batadv_orig_node *orig_node);
 	int (*bat_orig_add_if)(struct batadv_orig_node *orig_node,
 			       int max_if_num);