diff options
Diffstat (limited to 'include/net/neighbour.h')
| -rw-r--r-- | include/net/neighbour.h | 47 |
1 files changed, 35 insertions, 12 deletions
diff --git a/include/net/neighbour.h b/include/net/neighbour.h index 242879b6c4d..55590ab16b3 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 = ACCESS_ONCE(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 |