Staging: batman-adv: Move tables from sysfs to debugfs

Files which represent more than a single attribute aren't allowed in
sysfs. As we have some files which aren't essential and are lists or
tables aggregated from data from different places inside batman-adv, we
must place them in a filesystem without such a restriction.

Signed-off-by: Sven Eckelmann <sven.eckelmann@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 75 insertions, 74 deletions

diff --git a/drivers/staging/batman-adv/translation-table.c b/drivers/staging/batman-adv/translation-table.c
index e01ff2151f76..604122c59660 100644
--- a/drivers/staging/batman-adv/translation-table.c
+++ b/drivers/staging/batman-adv/translation-table.c
@@ -160,59 +160,59 @@ int hna_local_fill_buffer(unsigned char *buff, int buff_len)
 	return i;
 }
 
-int hna_local_fill_buffer_text(struct net_device *net_dev, char *buff,
-			       size_t count, loff_t off)
+int hna_local_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 hna_local_entry *hna_local_entry;
 	HASHIT(hashit);
-	int bytes_written = 0;
+	HASHIT(hashit_count);
 	unsigned long flags;
-	size_t hdr_len;
+	size_t buf_size, pos;
+	char *buff;
 
 	if (!bat_priv->primary_if) {
-		if (off == 0)
-			return sprintf(buff,
-				     "BATMAN mesh %s disabled - "
-				     "please specify interfaces to enable it\n",
-				     net_dev->name);
-
-		return 0;
+		return seq_printf(seq, "BATMAN mesh %s disabled - "
+			       "please specify interfaces to enable it\n",
+			       net_dev->name);
 	}
 
-	hdr_len = sprintf(buff,
-			  "Locally retrieved addresses (from %s) "
-			  "announced via HNA:\n",
-			  net_dev->name);
-
-	if (off < hdr_len)
-		bytes_written = hdr_len;
+	seq_printf(seq, "Locally retrieved addresses (from %s) "
+		   "announced via HNA:\n",
+		   net_dev->name);
 
 	spin_lock_irqsave(&hna_local_hash_lock, flags);
 
-	while (hash_iterate(hna_local_hash, &hashit)) {
-		hdr_len += 21;
-
-		if (count < bytes_written + 22)
-			break;
+	buf_size = 1;
+	/* Estimate length for: " * xx:xx:xx:xx:xx:xx\n" */
+	while (hash_iterate(hna_local_hash, &hashit_count))
+		buf_size += 21;
 
-		if (off >= hdr_len)
-			continue;
+	buff = kmalloc(buf_size, GFP_ATOMIC);
+	if (!buff) {
+		spin_unlock_irqrestore(&hna_local_hash_lock, flags);
+		return -ENOMEM;
+	}
+	buff[0] = '\0';
+	pos = 0;
 
+	while (hash_iterate(hna_local_hash, &hashit)) {
 		hna_local_entry = hashit.bucket->data;
 
-		bytes_written += snprintf(buff + bytes_written, 22,
-					  " * " MAC_FMT "\n",
-					  hna_local_entry->addr[0],
-					  hna_local_entry->addr[1],
-					  hna_local_entry->addr[2],
-					  hna_local_entry->addr[3],
-					  hna_local_entry->addr[4],
-					  hna_local_entry->addr[5]);
+		pos += snprintf(buff + pos, 22, " * " MAC_FMT "\n",
+				hna_local_entry->addr[0],
+				hna_local_entry->addr[1],
+				hna_local_entry->addr[2],
+				hna_local_entry->addr[3],
+				hna_local_entry->addr[4],
+				hna_local_entry->addr[5]);
 	}
 
 	spin_unlock_irqrestore(&hna_local_hash_lock, flags);
-	return bytes_written;
+
+	seq_printf(seq, "%s", buff);
+	kfree(buff);
+	return 0;
 }
 
 static void _hna_local_del(void *data)
@@ -378,65 +378,66 @@ void hna_global_add_orig(struct orig_node *orig_node,
 	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
 }
 
-int hna_global_fill_buffer_text(struct net_device *net_dev, char *buff,
-				size_t count, loff_t off)
+int hna_global_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 hna_global_entry *hna_global_entry;
 	HASHIT(hashit);
-	int bytes_written = 0;
+	HASHIT(hashit_count);
 	unsigned long flags;
-	size_t hdr_len;
+	size_t buf_size, pos;
+	char *buff;
 
 	if (!bat_priv->primary_if) {
-		if (off == 0)
-			return sprintf(buff,
-				     "BATMAN mesh %s disabled - "
-				     "please specify interfaces to enable it\n",
-				     net_dev->name);
-
-		return 0;
+		return seq_printf(seq, "BATMAN mesh %s disabled - "
+				  "please specify interfaces to enable it\n",
+				  net_dev->name);
 	}
 
-	hdr_len = sprintf(buff,
-			  "Globally announced HNAs received via the mesh %s "
-			  "(translation table):\n",
-			  net_dev->name);
-
-	if (off < hdr_len)
-		bytes_written = hdr_len;
+	seq_printf(seq, "Globally announced HNAs received via the mesh %s "
+			"(translation table):\n",
+		   net_dev->name);
 
 	spin_lock_irqsave(&hna_global_hash_lock, flags);
 
-	while (hash_iterate(hna_global_hash, &hashit)) {
-		hdr_len += 43;
-
-		if (count < bytes_written + 44)
-			break;
+	buf_size = 1;
+	/* Estimate length for: " * xx:xx:xx:xx:xx:xx via xx:xx:xx:xx:xx:xx\n"*/
+	while (hash_iterate(hna_global_hash, &hashit_count))
+		buf_size += 43;
 
-		if (off >= hdr_len)
-			continue;
+	buff = kmalloc(buf_size, GFP_ATOMIC);
+	if (!buff) {
+		spin_unlock_irqrestore(&hna_global_hash_lock, flags);
+		return -ENOMEM;
+	}
+	buff[0] = '\0';
+	pos = 0;
 
+	while (hash_iterate(hna_global_hash, &hashit)) {
 		hna_global_entry = hashit.bucket->data;
 
-		bytes_written += snprintf(buff + bytes_written, 44,
-					  " * " MAC_FMT " via " MAC_FMT "\n",
-					  hna_global_entry->addr[0],
-					  hna_global_entry->addr[1],
-					  hna_global_entry->addr[2],
-					  hna_global_entry->addr[3],
-					  hna_global_entry->addr[4],
-					  hna_global_entry->addr[5],
-					  hna_global_entry->orig_node->orig[0],
-					  hna_global_entry->orig_node->orig[1],
-					  hna_global_entry->orig_node->orig[2],
-					  hna_global_entry->orig_node->orig[3],
-					  hna_global_entry->orig_node->orig[4],
-					  hna_global_entry->orig_node->orig[5]);
+		pos += snprintf(buff + pos, 44,
+				" * " MAC_FMT " via " MAC_FMT "\n",
+				hna_global_entry->addr[0],
+				hna_global_entry->addr[1],
+				hna_global_entry->addr[2],
+				hna_global_entry->addr[3],
+				hna_global_entry->addr[4],
+				hna_global_entry->addr[5],
+				hna_global_entry->orig_node->orig[0],
+				hna_global_entry->orig_node->orig[1],
+				hna_global_entry->orig_node->orig[2],
+				hna_global_entry->orig_node->orig[3],
+				hna_global_entry->orig_node->orig[4],
+				hna_global_entry->orig_node->orig[5]);
 	}
 
 	spin_unlock_irqrestore(&hna_global_hash_lock, flags);
-	return bytes_written;
+
+	seq_printf(seq, "%s", buff);
+	kfree(buff);
+	return 0;
 }
 
 void _hna_global_del_orig(struct hna_global_entry *hna_global_entry,