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authordpward <david.ward@ll.mit.edu>2011-09-05 16:47:24 +0000
committerDavid S. Miller <davem@davemloft.net>2011-09-16 17:47:28 -0400
commitaa1c366e4febc7f5c2b84958a2dd7cd70e28f9d0 (patch)
tree336ecab3185913c78fb3ac81779a373e4d4ae5af /include
parentnet: Align AF-specific flowi structs to long (diff)
downloadlinux-dev-aa1c366e4febc7f5c2b84958a2dd7cd70e28f9d0.tar.xz
linux-dev-aa1c366e4febc7f5c2b84958a2dd7cd70e28f9d0.zip
net: Handle different key sizes between address families in flow cache
With the conversion of struct flowi to a union of AF-specific structs, some operations on the flow cache need to account for the exact size of the key. Signed-off-by: David Ward <david.ward@ll.mit.edu> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/flow.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/include/net/flow.h b/include/net/flow.h
index 2ec377d9ab9f..a09447749e2d 100644
--- a/include/net/flow.h
+++ b/include/net/flow.h
@@ -7,6 +7,7 @@
#ifndef _NET_FLOW_H
#define _NET_FLOW_H
+#include <linux/socket.h>
#include <linux/in6.h>
#include <linux/atomic.h>
@@ -161,6 +162,24 @@ static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn)
return container_of(fldn, struct flowi, u.dn);
}
+typedef unsigned long flow_compare_t;
+
+static inline size_t flow_key_size(u16 family)
+{
+ switch (family) {
+ case AF_INET:
+ BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t));
+ return sizeof(struct flowi4) / sizeof(flow_compare_t);
+ case AF_INET6:
+ BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t));
+ return sizeof(struct flowi6) / sizeof(flow_compare_t);
+ case AF_DECnet:
+ BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t));
+ return sizeof(struct flowidn) / sizeof(flow_compare_t);
+ }
+ return 0;
+}
+
#define FLOW_DIR_IN 0
#define FLOW_DIR_OUT 1
#define FLOW_DIR_FWD 2