X-Git-Url: https://bbs.cooldavid.org/git/?a=blobdiff_plain;f=include%2Fnet%2Fneighbour.h;h=6beb1ffc2b7fcfe9d360717ccde3f70bd8ac0e3d;hb=ef22b7b65f0eda9015becc7bff225a399914a242;hp=242879b6c4df8a4f539c3746dabb26bfe08a9dd8;hpb=91151240ed8e97cc4457dae4094153c2744f1eb8;p=net-next-2.6.git

diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index 242879b6c4d..6beb1ffc2b7 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -91,26 +91,28 @@ struct neigh_statistics {
 #define NEIGH_CACHE_STAT_INC(tbl, field) this_cpu_inc((tbl)->stats->field)
 
 struct neighbour {
-	struct neighbour	*next;
+	struct neighbour __rcu	*next;
 	struct neigh_table	*tbl;
 	struct neigh_parms	*parms;
-	struct net_device		*dev;
-	unsigned long		used;
 	unsigned long		confirmed;
 	unsigned long		updated;
 	__u8			flags;
 	__u8			nud_state;
 	__u8			type;
 	__u8			dead;
+	atomic_t		refcnt;
+	struct sk_buff_head	arp_queue;
+	struct timer_list	timer;
+	unsigned long		used;
 	atomic_t		probes;
 	rwlock_t		lock;
+	seqlock_t		ha_lock;
 	unsigned char		ha[ALIGN(MAX_ADDR_LEN, sizeof(unsigned long))];
 	struct hh_cache		*hh;
-	atomic_t		refcnt;
 	int			(*output)(struct sk_buff *skb);
-	struct sk_buff_head	arp_queue;
-	struct timer_list	timer;
 	const struct neigh_ops	*ops;
+	struct rcu_head		rcu;
+	struct net_device	*dev;
 	u8			primary_key[0];
 };
 
@@ -138,13 +140,22 @@ struct pneigh_entry {
  *	neighbour table manipulation
  */
 
+struct neigh_hash_table {
+	struct neighbour __rcu	**hash_buckets;
+	unsigned int		hash_mask;
+	__u32			hash_rnd;
+	struct rcu_head		rcu;
+};
+
 
 struct neigh_table {
 	struct neigh_table	*next;
 	int			family;
 	int			entry_size;
 	int			key_len;
-	__u32			(*hash)(const void *pkey, const struct net_device *);
+	__u32			(*hash)(const void *pkey,
+					const struct net_device *dev,
+					__u32 hash_rnd);
 	int			(*constructor)(struct neighbour *);
 	int			(*pconstructor)(struct pneigh_entry *);
 	void			(*pdestructor)(struct pneigh_entry *);
@@ -163,11 +174,9 @@ struct neigh_table {
 	atomic_t		entries;
 	rwlock_t		lock;
 	unsigned long		last_rand;
-	struct kmem_cache		*kmem_cachep;
+	struct kmem_cache	*kmem_cachep;
 	struct neigh_statistics	__percpu *stats;
-	struct neighbour	**hash_buckets;
-	unsigned int		hash_mask;
-	__u32			hash_rnd;
+	struct neigh_hash_table __rcu *nht;
 	struct pneigh_entry	**phash_buckets;
 };
 
@@ -237,6 +246,7 @@ extern void pneigh_for_each(struct neigh_table *tbl, void (*cb)(struct pneigh_en
 struct neigh_seq_state {
 	struct seq_net_private p;
 	struct neigh_table *tbl;
+	struct neigh_hash_table *nht;
 	void *(*neigh_sub_iter)(struct neigh_seq_state *state,
 				struct neighbour *n, loff_t *pos);
 	unsigned int bucket;
@@ -293,7 +303,10 @@ static inline void neigh_confirm(struct neighbour *neigh)
 
 static inline int neigh_event_send(struct neighbour *neigh, struct sk_buff *skb)
 {
-	neigh->used = jiffies;
+	unsigned long now = jiffies;
+	
+	if (neigh->used != now)
+		neigh->used = now;
 	if (!(neigh->nud_state&(NUD_CONNECTED|NUD_DELAY|NUD_PROBE)))
 		return __neigh_event_send(neigh, skb);
 	return 0;
@@ -364,4 +377,14 @@ struct neighbour_cb {
 
 #define NEIGH_CB(skb)	((struct neighbour_cb *)(skb)->cb)
 
+static inline void neigh_ha_snapshot(char *dst, const struct neighbour *n,
+				     const struct net_device *dev)
+{
+	unsigned int seq;
+
+	do {
+		seq = read_seqbegin(&n->ha_lock);
+		memcpy(dst, n->ha, dev->addr_len);
+	} while (read_seqretry(&n->ha_lock, seq));
+}
 #endif