diff mbox

[06/12] batman-adv: Avoid redundant hash_find() call for own unicast packets

Message ID 1299086321-25116-7-git-send-email-linus.luessing@ascom.ch
State Rejected, archived
Headers show

Commit Message

Linus Lüssing March 2, 2011, 5:18 p.m. UTC
Signed-off-by: Linus Lüssing <linus.luessing@ascom.ch>
---
 routing.c        |   43 ++++++++++++++++++-------------------------
 routing.h        |    8 +++-----
 soft-interface.c |    7 +++++--
 unicast.c        |    6 ++----
 4 files changed, 28 insertions(+), 36 deletions(-)
diff mbox

Patch

diff --git a/routing.c b/routing.c
index 97e99ce..60579fc 100644
--- a/routing.c
+++ b/routing.c
@@ -1021,10 +1021,10 @@  out:
 /* find a suitable router for this originator, and use
  * bonding if possible. increases the found neighbors
  * refcount.*/
-struct neigh_node *find_router(struct bat_priv *bat_priv,
-			       struct orig_node *orig_node,
+struct neigh_node *find_router(struct orig_node *orig_node,
 			       struct hard_iface *recv_if)
 {
+	struct bat_priv *bat_priv;
 	struct orig_node *primary_orig_node;
 	struct orig_node *router_orig;
 	struct neigh_node *router, *first_candidate, *tmp_neigh_node;
@@ -1037,6 +1037,8 @@  struct neigh_node *find_router(struct bat_priv *bat_priv,
 	if (!orig_node->router)
 		return NULL;
 
+	bat_priv = orig_node->bat_priv;
+
 	/* without bonding, the first node should
 	 * always choose the default router. */
 	bonding_enabled = atomic_read(&bat_priv->bonding);
@@ -1189,26 +1191,15 @@  static int check_unicast_packet(struct sk_buff *skb, int hdr_size)
 	return 0;
 }
 
-int route_unicast_packet(struct bat_priv *bat_priv, struct sk_buff *skb,
-			 struct hard_iface *recv_if, uint8_t *dest,
-			 uint8_t packet_type)
+int route_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if,
+			 struct orig_node *orig_node, uint8_t packet_type)
 {
-	struct orig_node *orig_node = NULL;
 	struct neigh_node *neigh_node = NULL;
 	int ret = NET_RX_DROP;
 	struct sk_buff *new_skb;
 
-	/* get routing information */
-	rcu_read_lock();
-	orig_node = orig_hash_find(bat_priv, dest);
-
-	if (!orig_node)
-		goto unlock;
-
-	rcu_read_unlock();
-
 	/* find_router() increases neigh_nodes refcount if found. */
-	neigh_node = find_router(bat_priv, orig_node, recv_if);
+	neigh_node = find_router(orig_node, recv_if);
 
 	if (!neigh_node)
 		goto out;
@@ -1218,9 +1209,9 @@  int route_unicast_packet(struct bat_priv *bat_priv, struct sk_buff *skb,
 		goto out;
 
 	if (packet_type == BAT_UNICAST &&
-	    atomic_read(&bat_priv->fragmentation) &&
+	    atomic_read(&orig_node->bat_priv->fragmentation) &&
 	    skb->len > neigh_node->if_incoming->net_dev->mtu) {
-		ret = frag_send_skb(skb, bat_priv,
+		ret = frag_send_skb(skb, orig_node->bat_priv,
 				    neigh_node->if_incoming, neigh_node->addr);
 		goto out;
 	}
@@ -1228,7 +1219,7 @@  int route_unicast_packet(struct bat_priv *bat_priv, struct sk_buff *skb,
 	if (packet_type == BAT_UNICAST_FRAG &&
 	    frag_can_reassemble(skb, neigh_node->if_incoming->net_dev->mtu)) {
 
-		ret = frag_reassemble_skb(skb, bat_priv, &new_skb);
+		ret = frag_reassemble_skb(skb, orig_node->bat_priv, &new_skb);
 
 		if (ret == NET_RX_DROP)
 			goto out;
@@ -1247,8 +1238,6 @@  int route_unicast_packet(struct bat_priv *bat_priv, struct sk_buff *skb,
 	ret = NET_RX_SUCCESS;
 	goto out;
 
-unlock:
-	rcu_read_unlock();
 out:
 	if (neigh_node)
 		neigh_node_free_ref(neigh_node);
@@ -1261,6 +1250,7 @@  int recv_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 {
 	struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
 	struct unicast_packet *unicast_packet;
+	struct orig_node *orig_node;
 	int hdr_size = sizeof(struct unicast_packet);
 
 	if (check_unicast_packet(skb, hdr_size) < 0)
@@ -1274,14 +1264,16 @@  int recv_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 		return NET_RX_SUCCESS;
 	}
 
-	return route_unicast_packet(bat_priv, skb, recv_if,
-		unicast_packet->dest, unicast_packet->header.packet_type);
+	orig_node = orig_hash_find(bat_priv, unicast_packet->dest);
+	return route_unicast_packet(skb, recv_if, orig_node,
+				    unicast_packet->header.packet_type);
 }
 
 int recv_ucast_frag_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 {
 	struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
 	struct unicast_frag_packet *unicast_packet;
+	struct orig_node *orig_node;
 	int hdr_size = sizeof(struct unicast_frag_packet);
 	struct sk_buff *new_skb = NULL;
 	int ret;
@@ -1308,8 +1300,9 @@  int recv_ucast_frag_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 		return NET_RX_SUCCESS;
 	}
 
-	return route_unicast_packet(bat_priv, skb, recv_if,
-		unicast_packet->dest, unicast_packet->header.packet_type);
+	orig_node = orig_hash_find(bat_priv, unicast_packet->dest);
+	return route_unicast_packet(skb, recv_if, orig_node,
+				    unicast_packet->header.packet_type);
 }
 
 
diff --git a/routing.h b/routing.h
index 5972bf3..d97f720 100644
--- a/routing.h
+++ b/routing.h
@@ -30,17 +30,15 @@  void receive_bat_packet(struct ethhdr *ethhdr,
 void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node,
 		   struct neigh_node *neigh_node, unsigned char *hna_buff,
 		   int hna_buff_len);
-int route_unicast_packet(struct bat_priv *bat_priv, struct sk_buff *skb,
-			 struct hard_iface *recv_if, uint8_t *dest,
-			 uint8_t packet_type);
+int route_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if,
+			 struct orig_node *orig_node, uint8_t packet_type);
 int recv_icmp_packet(struct sk_buff *skb, struct hard_iface *recv_if);
 int recv_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if);
 int recv_ucast_frag_packet(struct sk_buff *skb, struct hard_iface *recv_if);
 int recv_bcast_packet(struct sk_buff *skb, struct hard_iface *recv_if);
 int recv_vis_packet(struct sk_buff *skb, struct hard_iface *recv_if);
 int recv_bat_packet(struct sk_buff *skb, struct hard_iface *recv_if);
-struct neigh_node *find_router(struct bat_priv *bat_priv,
-			       struct orig_node *orig_node,
+struct neigh_node *find_router(struct orig_node *orig_node,
 			       struct hard_iface *recv_if);
 void bonding_candidate_del(struct orig_node *orig_node,
 			   struct neigh_node *neigh_node);
diff --git a/soft-interface.c b/soft-interface.c
index bd460b3..07fe7c8 100644
--- a/soft-interface.c
+++ b/soft-interface.c
@@ -20,6 +20,7 @@ 
  */
 
 #include "main.h"
+#include "originator.h"
 #include "soft-interface.h"
 #include "hard-interface.h"
 #include "routing.h"
@@ -419,6 +420,7 @@  void interface_rx(struct net_device *soft_iface,
 {
 	struct bat_priv *bat_priv = netdev_priv(soft_iface);
 	struct unicast_packet *unicast_packet;
+	struct orig_node *orig_node;
 	struct ethhdr *ethhdr;
 	struct vlan_ethhdr *vhdr;
 	short vid = -1;
@@ -462,8 +464,9 @@  void interface_rx(struct net_device *soft_iface,
 
 		memcpy(unicast_packet->dest,
 		       bat_priv->softif_neigh->addr, ETH_ALEN);
-		ret = route_unicast_packet(bat_priv, skb, recv_if,
-					   unicast_packet->dest,
+
+		orig_node = orig_hash_find(bat_priv, unicast_packet->dest);
+		ret = route_unicast_packet(skb, recv_if, orig_node,
 					   unicast_packet->header.packet_type);
 		if (ret == NET_RX_DROP)
 			goto dropped;
diff --git a/unicast.c b/unicast.c
index c6c465c..54e956b 100644
--- a/unicast.c
+++ b/unicast.c
@@ -308,12 +308,10 @@  route:
 	/* copy the destination for faster routing */
 	memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN);
 
-	ret = route_unicast_packet(orig_node->bat_priv, skb, NULL,
-		unicast_packet->dest, unicast_packet->header.packet_type);
+	ret = route_unicast_packet(skb, NULL, orig_node,
+				   unicast_packet->header.packet_type);
 
 out:
-	if (orig_node)
-		orig_node_free_ref(orig_node);
 	if (ret == NET_RX_DROP)
 		kfree_skb(skb);