[1/7] neigh: Create mechanism for generic neigh private areas.

Submitted by David Miller on Dec. 1, 2011, 3:41 a.m.

Details

Message ID 20111130.224131.726739875792706779.davem@davemloft.net
State Accepted
Delegated to: David Miller
Headers show

Commit Message

David Miller Dec. 1, 2011, 3:41 a.m.
The implementation private sits right after the primary_key memory.

Signed-off-by: David S. Miller <davem@davemloft.net>
---
 include/net/neighbour.h |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

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diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index 7ae5acf..87c0e5c 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -179,6 +179,13 @@  struct neigh_table {
 	struct pneigh_entry	**phash_buckets;
 };
 
+#define NEIGH_PRIV_ALIGN	sizeof(long long)
+
+static inline void *neighbour_priv(const struct neighbour *n)
+{
+	return (char *)n + ALIGN(sizeof(*n) + n->tbl->key_len, NEIGH_PRIV_ALIGN);
+}
+
 /* flags for neigh_update() */
 #define NEIGH_UPDATE_F_OVERRIDE			0x00000001
 #define NEIGH_UPDATE_F_WEAK_OVERRIDE		0x00000002