Staging: batman-adv: move queue counters into bat_priv

to support multiple mesh devices later, we need to move global variables
like the queues into corresponding private structs bat_priv of the soft
devices.

Note that this patch still has a lot of FIXMEs and depends on the global
soft_device variable. This should be resolved later, e.g. by referencing
the parent soft device in batman_if.
Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
[sven.eckelmann@gmx.de: Rework on top of current version]
Signed-off-by: Sven Eckelmann <sven.eckelmann@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/batman-adv/aggregation.c

@@ -111,7 +111,7 @@ static void new_aggregated_packet(unsigned char *packet_buff,
 
 	/* own packet should always be scheduled */
 	if (!own_packet) {
-		if (!atomic_dec_not_zero(&batman_queue_left)) {
+		if (!atomic_dec_not_zero(&bat_priv->batman_queue_left)) {
 			bat_dbg(DBG_BATMAN, bat_priv,
 				"batman packet queue full\n");
 			return;
@@ -121,7 +121,7 @@ static void new_aggregated_packet(unsigned char *packet_buff,
 	forw_packet_aggr = kmalloc(sizeof(struct forw_packet), GFP_ATOMIC);
 	if (!forw_packet_aggr) {
 		if (!own_packet)
-			atomic_inc(&batman_queue_left);
+			atomic_inc(&bat_priv->batman_queue_left);
 		return;
 	}
 
@@ -129,7 +129,7 @@ static void new_aggregated_packet(unsigned char *packet_buff,
 						GFP_ATOMIC);
 	if (!forw_packet_aggr->packet_buff) {
 		if (!own_packet)
-			atomic_inc(&batman_queue_left);
+			atomic_inc(&bat_priv->batman_queue_left);
 		kfree(forw_packet_aggr);
 		return;
 	}

drivers/staging/batman-adv/bat_sysfs.c

@@ -311,6 +311,8 @@ int sysfs_add_meshif(struct net_device *dev)
 	atomic_set(&bat_priv->vis_mode, VIS_TYPE_CLIENT_UPDATE);
 	atomic_set(&bat_priv->orig_interval, 1000);
 	atomic_set(&bat_priv->log_level, 0);
+	atomic_set(&bat_priv->bcast_queue_left, BCAST_QUEUE_LEN);
+	atomic_set(&bat_priv->batman_queue_left, BATMAN_QUEUE_LEN);
 
 	bat_priv->primary_if = NULL;
 	bat_priv->num_ifaces = 0;

drivers/staging/batman-adv/main.c

@@ -42,9 +42,6 @@ DEFINE_SPINLOCK(orig_hash_lock);
 DEFINE_SPINLOCK(forw_bat_list_lock);
 DEFINE_SPINLOCK(forw_bcast_list_lock);
 
-atomic_t bcast_queue_left;
-atomic_t batman_queue_left;
-
 int16_t num_hna;
 
 struct net_device *soft_device;
@@ -69,9 +66,6 @@ static int __init batman_init(void)
 
 	atomic_set(&module_state, MODULE_INACTIVE);
 
-	atomic_set(&bcast_queue_left, BCAST_QUEUE_LEN);
-	atomic_set(&batman_queue_left, BATMAN_QUEUE_LEN);
-
 	/* the name should not be longer than 10 chars - see
 	 * http://lwn.net/Articles/23634/ */
 	bat_event_workqueue = create_singlethread_workqueue("bat_events");

drivers/staging/batman-adv/main.h

@@ -136,8 +136,6 @@ extern spinlock_t orig_hash_lock;
 extern spinlock_t forw_bat_list_lock;
 extern spinlock_t forw_bcast_list_lock;
 
-extern atomic_t bcast_queue_left;
-extern atomic_t batman_queue_left;
 extern int16_t num_hna;
 
 extern struct net_device *soft_device;

drivers/staging/batman-adv/send.c

@@ -404,7 +404,7 @@ int add_bcast_packet_to_list(struct sk_buff *skb)
 	/* FIXME: each batman_if will be attached to a softif */
 	struct bat_priv *bat_priv = netdev_priv(soft_device);
 
-	if (!atomic_dec_not_zero(&bcast_queue_left)) {
+	if (!atomic_dec_not_zero(&bat_priv->bcast_queue_left)) {
 		bat_dbg(DBG_BATMAN, bat_priv, "bcast packet queue full\n");
 		goto out;
 	}
@@ -436,7 +436,7 @@ int add_bcast_packet_to_list(struct sk_buff *skb)
 packet_free:
 	kfree(forw_packet);
 out_and_inc:
-	atomic_inc(&bcast_queue_left);
+	atomic_inc(&bat_priv->bcast_queue_left);
 out:
 	return NETDEV_TX_BUSY;
 }
@@ -450,6 +450,8 @@ static void send_outstanding_bcast_packet(struct work_struct *work)
 		container_of(delayed_work, struct forw_packet, delayed_work);
 	unsigned long flags;
 	struct sk_buff *skb1;
+	/* FIXME: each batman_if will be attached to a softif */
+	struct bat_priv *bat_priv = netdev_priv(soft_device);
 
 	spin_lock_irqsave(&forw_bcast_list_lock, flags);
 	hlist_del(&forw_packet->list);
@@ -479,7 +481,7 @@ static void send_outstanding_bcast_packet(struct work_struct *work)
 
 out:
 	forw_packet_free(forw_packet);
-	atomic_inc(&bcast_queue_left);
+	atomic_inc(&bat_priv->bcast_queue_left);
 }
 
 void send_outstanding_bat_packet(struct work_struct *work)
@@ -489,6 +491,8 @@ void send_outstanding_bat_packet(struct work_struct *work)
 	struct forw_packet *forw_packet =
 		container_of(delayed_work, struct forw_packet, delayed_work);
 	unsigned long flags;
+	/* FIXME: each batman_if will be attached to a softif */
+	struct bat_priv *bat_priv = netdev_priv(soft_device);
 
 	spin_lock_irqsave(&forw_bat_list_lock, flags);
 	hlist_del(&forw_packet->list);
@@ -510,7 +514,7 @@ void send_outstanding_bat_packet(struct work_struct *work)
 out:
 	/* don't count own packet */
 	if (!forw_packet->own)
-		atomic_inc(&batman_queue_left);
+		atomic_inc(&bat_priv->batman_queue_left);
 
 	forw_packet_free(forw_packet);
 }

drivers/staging/batman-adv/types.h

@@ -113,6 +113,8 @@ struct bat_priv {
 	atomic_t vis_mode;
 	atomic_t orig_interval;
 	atomic_t log_level;
+	atomic_t bcast_queue_left;
+	atomic_t batman_queue_left;
 	char num_ifaces;
 	struct debug_log *debug_log;
 	struct batman_if *primary_if;