@@ -17,6 +17,7 @@
#include <linux/kernel.h>
#include <linux/kmemcheck.h>
#include <linux/compiler.h>
+#include <linux/jhash.h>
#include <linux/time.h>
#include <linux/bug.h>
#include <linux/cache.h>
@@ -920,6 +921,20 @@ static inline __u32 skb_get_hash(struct sk_buff *skb)
return skb->hash;
}
+static inline __u32 skb_get_hash_perturb(struct sk_buff *skb,
+ u32 perturb)
+{
+ u32 hash = skb_get_hash(skb);
+
+ if (likely(hash)) {
+ hash = jhash_1word((__force __u32) hash, perturb);
+ if (unlikely(!hash))
+ hash = 1;
+ }
+
+ return hash;
+}
+
static inline __u32 skb_get_hash_raw(const struct sk_buff *skb)
{
return skb->hash;
This is used to get the skb->hash and then perturb it for a local use. Signed-off-by: Tom Herbert <therbert@google.com> --- include/linux/skbuff.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+)