diff options
Diffstat (limited to 'include/net/dst.h')
| -rw-r--r-- | include/net/dst.h | 59 |
1 files changed, 46 insertions, 13 deletions
diff --git a/include/net/dst.h b/include/net/dst.h index e12ddfb9eb16..4fb6c4381791 100644 --- a/include/net/dst.h +++ b/include/net/dst.h @@ -37,8 +37,7 @@ struct dst_entry { unsigned long _metrics; unsigned long expires; struct dst_entry *path; - struct neighbour *neighbour; - struct hh_cache *hh; + struct neighbour __rcu *_neighbour; #ifdef CONFIG_XFRM struct xfrm_state *xfrm; #else @@ -47,6 +46,14 @@ struct dst_entry { int (*input)(struct sk_buff*); int (*output)(struct sk_buff*); + int flags; +#define DST_HOST 0x0001 +#define DST_NOXFRM 0x0002 +#define DST_NOPOLICY 0x0004 +#define DST_NOHASH 0x0008 +#define DST_NOCACHE 0x0010 +#define DST_NOCOUNT 0x0020 + short error; short obsolete; unsigned short header_len; /* more space at head required */ @@ -62,7 +69,7 @@ struct dst_entry { * (L1_CACHE_SIZE would be too much) */ #ifdef CONFIG_64BIT - long __pad_to_align_refcnt[1]; + long __pad_to_align_refcnt[2]; #endif /* * __refcnt wants to be on a different cache line from @@ -71,13 +78,6 @@ struct dst_entry { atomic_t __refcnt; /* client references */ int __use; unsigned long lastuse; - int flags; -#define DST_HOST 0x0001 -#define DST_NOXFRM 0x0002 -#define DST_NOPOLICY 0x0004 -#define DST_NOHASH 0x0008 -#define DST_NOCACHE 0x0010 -#define DST_NOCOUNT 0x0020 union { struct dst_entry *next; struct rtable __rcu *rt_next; @@ -86,6 +86,21 @@ struct dst_entry { }; }; +static inline struct neighbour *dst_get_neighbour(struct dst_entry *dst) +{ + return rcu_dereference(dst->_neighbour); +} + +static inline struct neighbour *dst_get_neighbour_raw(struct dst_entry *dst) +{ + return rcu_dereference_raw(dst->_neighbour); +} + +static inline void dst_set_neighbour(struct dst_entry *dst, struct neighbour *neigh) +{ + rcu_assign_pointer(dst->_neighbour, neigh); +} + extern u32 *dst_cow_metrics_generic(struct dst_entry *dst, unsigned long old); extern const u32 dst_default_metrics[RTAX_MAX]; @@ -310,7 +325,14 @@ static inline void skb_dst_force(struct sk_buff *skb) static inline void __skb_tunnel_rx(struct sk_buff *skb, struct net_device *dev) { skb->dev = dev; - skb->rxhash = 0; + + /* + * Clear rxhash so that we can recalulate the hash for the + * encapsulated packet, unless we have already determine the hash + * over the L4 4-tuple. + */ + if (!skb->l4_rxhash) + skb->rxhash = 0; skb_set_queue_mapping(skb, 0); skb_dst_drop(skb); nf_reset(skb); @@ -371,8 +393,19 @@ static inline void dst_rcu_free(struct rcu_head *head) static inline void dst_confirm(struct dst_entry *dst) { - if (dst) - neigh_confirm(dst->neighbour); + if (dst) { + struct neighbour *n; + + rcu_read_lock(); + n = dst_get_neighbour(dst); + neigh_confirm(n); + rcu_read_unlock(); + } +} + +static inline struct neighbour *dst_neigh_lookup(const struct dst_entry *dst, const void *daddr) +{ + return dst->ops->neigh_lookup(dst, daddr); } static inline void dst_link_failure(struct sk_buff *skb) |