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-rw-r--r--include/net/dst.h92
1 files changed, 51 insertions, 41 deletions
diff --git a/include/net/dst.h b/include/net/dst.h
index 8197eadca81..baf59789006 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -42,16 +42,16 @@ struct dst_entry {
struct dst_entry *from;
};
struct dst_entry *path;
- struct neighbour __rcu *_neighbour;
+ void *__pad0;
#ifdef CONFIG_XFRM
struct xfrm_state *xfrm;
#else
void *__pad1;
#endif
- int (*input)(struct sk_buff*);
- int (*output)(struct sk_buff*);
+ int (*input)(struct sk_buff *);
+ int (*output)(struct sk_buff *);
- int flags;
+ unsigned short flags;
#define DST_HOST 0x0001
#define DST_NOXFRM 0x0002
#define DST_NOPOLICY 0x0004
@@ -62,8 +62,23 @@ struct dst_entry {
#define DST_FAKE_RTABLE 0x0080
#define DST_XFRM_TUNNEL 0x0100
+ unsigned short pending_confirm;
+
short error;
+
+ /* A non-zero value of dst->obsolete forces by-hand validation
+ * of the route entry. Positive values are set by the generic
+ * dst layer to indicate that the entry has been forcefully
+ * destroyed.
+ *
+ * Negative values are used by the implementation layer code to
+ * force invocation of the dst_ops->check() method.
+ */
short obsolete;
+#define DST_OBSOLETE_NONE 0
+#define DST_OBSOLETE_DEAD 2
+#define DST_OBSOLETE_FORCE_CHK -1
+#define DST_OBSOLETE_KILL -2
unsigned short header_len; /* more space at head required */
unsigned short trailer_len; /* space to reserve at tail */
#ifdef CONFIG_IP_ROUTE_CLASSID
@@ -94,21 +109,6 @@ struct dst_entry {
};
};
-static inline struct neighbour *dst_get_neighbour_noref(struct dst_entry *dst)
-{
- return rcu_dereference(dst->_neighbour);
-}
-
-static inline struct neighbour *dst_get_neighbour_noref_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];
@@ -222,12 +222,6 @@ static inline unsigned long dst_metric_rtt(const struct dst_entry *dst, int metr
return msecs_to_jiffies(dst_metric(dst, metric));
}
-static inline void set_dst_metric_rtt(struct dst_entry *dst, int metric,
- unsigned long rtt)
-{
- dst_metric_set(dst, metric, jiffies_to_msecs(rtt));
-}
-
static inline u32
dst_allfrag(const struct dst_entry *dst)
{
@@ -241,7 +235,7 @@ dst_metric_locked(const struct dst_entry *dst, int metric)
return dst_metric(dst, RTAX_LOCK) & (1<<metric);
}
-static inline void dst_hold(struct dst_entry * dst)
+static inline void dst_hold(struct dst_entry *dst)
{
/*
* If your kernel compilation stops here, please check
@@ -264,8 +258,7 @@ static inline void dst_use_noref(struct dst_entry *dst, unsigned long time)
dst->lastuse = time;
}
-static inline
-struct dst_entry * dst_clone(struct dst_entry * dst)
+static inline struct dst_entry *dst_clone(struct dst_entry *dst)
{
if (dst)
atomic_inc(&dst->__refcnt);
@@ -371,14 +364,15 @@ static inline struct dst_entry *skb_dst_pop(struct sk_buff *skb)
}
extern int dst_discard(struct sk_buff *skb);
-extern void *dst_alloc(struct dst_ops * ops, struct net_device *dev,
- int initial_ref, int initial_obsolete, int flags);
-extern void __dst_free(struct dst_entry * dst);
-extern struct dst_entry *dst_destroy(struct dst_entry * dst);
+extern void *dst_alloc(struct dst_ops *ops, struct net_device *dev,
+ int initial_ref, int initial_obsolete,
+ unsigned short flags);
+extern void __dst_free(struct dst_entry *dst);
+extern struct dst_entry *dst_destroy(struct dst_entry *dst);
-static inline void dst_free(struct dst_entry * dst)
+static inline void dst_free(struct dst_entry *dst)
{
- if (dst->obsolete > 1)
+ if (dst->obsolete > 0)
return;
if (!atomic_read(&dst->__refcnt)) {
dst = dst_destroy(dst);
@@ -396,19 +390,35 @@ static inline void dst_rcu_free(struct rcu_head *head)
static inline void dst_confirm(struct dst_entry *dst)
{
- if (dst) {
- struct neighbour *n;
+ dst->pending_confirm = 1;
+}
- rcu_read_lock();
- n = dst_get_neighbour_noref(dst);
- neigh_confirm(n);
- rcu_read_unlock();
+static inline int dst_neigh_output(struct dst_entry *dst, struct neighbour *n,
+ struct sk_buff *skb)
+{
+ struct hh_cache *hh;
+
+ if (unlikely(dst->pending_confirm)) {
+ n->confirmed = jiffies;
+ dst->pending_confirm = 0;
}
+
+ hh = &n->hh;
+ if ((n->nud_state & NUD_CONNECTED) && hh->hh_len)
+ return neigh_hh_output(hh, skb);
+ else
+ return n->output(n, skb);
}
static inline struct neighbour *dst_neigh_lookup(const struct dst_entry *dst, const void *daddr)
{
- return dst->ops->neigh_lookup(dst, daddr);
+ return dst->ops->neigh_lookup(dst, NULL, daddr);
+}
+
+static inline struct neighbour *dst_neigh_lookup_skb(const struct dst_entry *dst,
+ struct sk_buff *skb)
+{
+ return dst->ops->neigh_lookup(dst, skb, NULL);
}
static inline void dst_link_failure(struct sk_buff *skb)