Merge tag 'batman-adv-for-davem' of git://git.open-mesh.org/linux-merge

Antonio Quartulli says:

====================
pull request: batman-adv 2014-08-05

this is a pull request intended for net-next/linux-3.17 (yeah..it's really
late).

Patches 1, 2 and 4 are really minor changes:
- kmalloc_array is substituted to kmalloc when possible (as suggested by
  checkpatch);
- net_ratelimited() is now used properly and the "suppressed" message is not
  printed anymore if not needed;
- the internal version number has been increased to reflect our current version.

Patch 3 instead is introducing a change in the metric computation function
by changing the penalty applied at each mesh hop from 15/255 (~6%) to
30/255 (~11%). This change is introduced by Simon Wunderlich after having
observed a performance improvement in several networks when using the new value.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

net/batman-adv/bat_iv_ogm.c

@@ -108,22 +108,23 @@ static int batadv_iv_ogm_orig_add_if(struct batadv_orig_node *orig_node,
 				     int max_if_num)
 {
 	void *data_ptr;
-	size_t data_size, old_size;
+	size_t old_size;
 	int ret = -ENOMEM;
 
 	spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock);
 
-	data_size = max_if_num * sizeof(unsigned long) * BATADV_NUM_WORDS;
 	old_size = (max_if_num - 1) * sizeof(unsigned long) * BATADV_NUM_WORDS;
-	data_ptr = kmalloc(data_size, GFP_ATOMIC);
+	data_ptr = kmalloc_array(max_if_num,
+				 BATADV_NUM_WORDS * sizeof(unsigned long),
+				 GFP_ATOMIC);
 	if (!data_ptr)
 		goto unlock;
 
 	memcpy(data_ptr, orig_node->bat_iv.bcast_own, old_size);
 	kfree(orig_node->bat_iv.bcast_own);
 	orig_node->bat_iv.bcast_own = data_ptr;
 
-	data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
+	data_ptr = kmalloc_array(max_if_num, sizeof(uint8_t), GFP_ATOMIC);
 	if (!data_ptr) {
 		kfree(orig_node->bat_iv.bcast_own);
 		goto unlock;
@@ -164,7 +165,7 @@ static int batadv_iv_ogm_orig_del_if(struct batadv_orig_node *orig_node,
 		goto free_bcast_own;
 
 	chunk_size = sizeof(unsigned long) * BATADV_NUM_WORDS;
-	data_ptr = kmalloc(max_if_num * chunk_size, GFP_ATOMIC);
+	data_ptr = kmalloc_array(max_if_num, chunk_size, GFP_ATOMIC);
 	if (!data_ptr)
 		goto unlock;
 
@@ -183,7 +184,7 @@ static int batadv_iv_ogm_orig_del_if(struct batadv_orig_node *orig_node,
 	if (max_if_num == 0)
 		goto free_own_sum;
 
-	data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
+	data_ptr = kmalloc_array(max_if_num, sizeof(uint8_t), GFP_ATOMIC);
 	if (!data_ptr) {
 		kfree(orig_node->bat_iv.bcast_own);
 		goto unlock;

net/batman-adv/distributed-arp-table.c

@@ -537,7 +537,8 @@ batadv_dat_select_candidates(struct batadv_priv *bat_priv, __be32 ip_dst)
 	if (!bat_priv->orig_hash)
 		return NULL;
 
-	res = kmalloc(BATADV_DAT_CANDIDATES_NUM * sizeof(*res), GFP_ATOMIC);
+	res = kmalloc_array(BATADV_DAT_CANDIDATES_NUM, sizeof(*res),
+			    GFP_ATOMIC);
 	if (!res)
 		return NULL;
 

net/batman-adv/hash.c

@@ -46,12 +46,12 @@ struct batadv_hashtable *batadv_hash_new(uint32_t size)
 	if (!hash)
 		return NULL;
 
-	hash->table = kmalloc(sizeof(*hash->table) * size, GFP_ATOMIC);
+	hash->table = kmalloc_array(size, sizeof(*hash->table), GFP_ATOMIC);
 	if (!hash->table)
 		goto free_hash;
 
-	hash->list_locks = kmalloc(sizeof(*hash->list_locks) * size,
-				   GFP_ATOMIC);
+	hash->list_locks = kmalloc_array(size, sizeof(*hash->list_locks),
+					 GFP_ATOMIC);
 	if (!hash->list_locks)
 		goto free_table;
 

net/batman-adv/main.h

@@ -24,7 +24,7 @@
 #define BATADV_DRIVER_DEVICE "batman-adv"
 
 #ifndef BATADV_SOURCE_VERSION
-#define BATADV_SOURCE_VERSION "2014.3.0"
+#define BATADV_SOURCE_VERSION "2014.4.0"
 #endif
 
 /* B.A.T.M.A.N. parameters */
@@ -238,21 +238,29 @@ enum batadv_dbg_level {
 int batadv_debug_log(struct batadv_priv *bat_priv, const char *fmt, ...)
 __printf(2, 3);
 
-#define batadv_dbg(type, bat_priv, fmt, arg...)			\
+/* possibly ratelimited debug output */
+#define _batadv_dbg(type, bat_priv, ratelimited, fmt, arg...)	\
 	do {							\
-		if (atomic_read(&bat_priv->log_level) & type)	\
+		if (atomic_read(&bat_priv->log_level) & type && \
+		    (!ratelimited || net_ratelimit()))		\
 			batadv_debug_log(bat_priv, fmt, ## arg);\
 	}							\
 	while (0)
 #else /* !CONFIG_BATMAN_ADV_DEBUG */
-__printf(3, 4)
-static inline void batadv_dbg(int type __always_unused,
-			      struct batadv_priv *bat_priv __always_unused,
-			      const char *fmt __always_unused, ...)
+__printf(4, 5)
+static inline void _batadv_dbg(int type __always_unused,
+			       struct batadv_priv *bat_priv __always_unused,
+			       int ratelimited __always_unused,
+			       const char *fmt __always_unused, ...)
 {
 }
 #endif
 
+#define batadv_dbg(type, bat_priv, arg...) \
+	_batadv_dbg(type, bat_priv, 0, ## arg)
+#define batadv_dbg_ratelimited(type, bat_priv, arg...) \
+	_batadv_dbg(type, bat_priv, 1, ## arg)
+
 #define batadv_info(net_dev, fmt, arg...)				\
 	do {								\
 		struct net_device *_netdev = (net_dev);                 \

net/batman-adv/routing.c

@@ -706,11 +706,11 @@ static int batadv_check_unicast_ttvn(struct batadv_priv *bat_priv,
 	if (batadv_tt_local_client_is_roaming(bat_priv, ethhdr->h_dest, vid)) {
 		if (batadv_reroute_unicast_packet(bat_priv, unicast_packet,
 						  ethhdr->h_dest, vid))
-			net_ratelimited_function(batadv_dbg, BATADV_DBG_TT,
-						 bat_priv,
-						 "Rerouting unicast packet to %pM (dst=%pM): Local Roaming\n",
-						 unicast_packet->dest,
-						 ethhdr->h_dest);
+			batadv_dbg_ratelimited(BATADV_DBG_TT,
+					       bat_priv,
+					       "Rerouting unicast packet to %pM (dst=%pM): Local Roaming\n",
+					       unicast_packet->dest,
+					       ethhdr->h_dest);
 		/* at this point the mesh destination should have been
 		 * substituted with the originator address found in the global
 		 * table. If not, let the packet go untouched anyway because
@@ -752,10 +752,10 @@ static int batadv_check_unicast_ttvn(struct batadv_priv *bat_priv,
 	 */
 	if (batadv_reroute_unicast_packet(bat_priv, unicast_packet,
 					  ethhdr->h_dest, vid)) {
-		net_ratelimited_function(batadv_dbg, BATADV_DBG_TT, bat_priv,
-					 "Rerouting unicast packet to %pM (dst=%pM): TTVN mismatch old_ttvn=%u new_ttvn=%u\n",
-					 unicast_packet->dest, ethhdr->h_dest,
-					 old_ttvn, curr_ttvn);
+		batadv_dbg_ratelimited(BATADV_DBG_TT, bat_priv,
+				       "Rerouting unicast packet to %pM (dst=%pM): TTVN mismatch old_ttvn=%u new_ttvn=%u\n",
+				       unicast_packet->dest, ethhdr->h_dest,
+				       old_ttvn, curr_ttvn);
 		return 1;
 	}
 

net/batman-adv/soft-interface.c

@@ -751,7 +751,7 @@ static int batadv_softif_init_late(struct net_device *dev)
 	atomic_set(&bat_priv->gw.bandwidth_down, 100);
 	atomic_set(&bat_priv->gw.bandwidth_up, 20);
 	atomic_set(&bat_priv->orig_interval, 1000);
-	atomic_set(&bat_priv->hop_penalty, 15);
+	atomic_set(&bat_priv->hop_penalty, 30);
 #ifdef CONFIG_BATMAN_ADV_DEBUG
 	atomic_set(&bat_priv->log_level, 0);
 #endif