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authorKrishna Kumar <krkumar2@in.ibm.com>2010-08-04 06:15:52 +0000
committerDavid S. Miller <davem@davemloft.net>2010-08-16 21:06:24 -0700
commitbfb564e7391340638afe4ad67744a8f3858e7566 (patch)
tree7f079d9c3f020d52efb555db414476c463584967 /include/linux/skbuff.h
parent6891dd25d3f82e50979b27fde1980aa96320b975 (diff)
core: Factor out flow calculation from get_rps_cpu
Factor out flow calculation code from get_rps_cpu, since other functions can use the same code. Revisions: v2 (Ben): Separate flow calcuation out and use in select queue. v3 (Arnd): Don't re-implement MIN. v4 (Changli): skb->data points to ethernet header in macvtap, and make a fast path. Tested macvtap with this patch. v5 (Changli): - Cache skb->rxhash in skb_get_rxhash - macvtap may not have pow(2) queues, so change code for queue selection. (Arnd): - Use first available queue if all fails. Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/skbuff.h')
-rw-r--r--include/linux/skbuff.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 77eb60d2b49..d8050382b18 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -558,6 +558,15 @@ extern unsigned int skb_find_text(struct sk_buff *skb, unsigned int from,
unsigned int to, struct ts_config *config,
struct ts_state *state);
+extern __u32 __skb_get_rxhash(struct sk_buff *skb);
+static inline __u32 skb_get_rxhash(struct sk_buff *skb)
+{
+ if (!skb->rxhash)
+ skb->rxhash = __skb_get_rxhash(skb);
+
+ return skb->rxhash;
+}
+
#ifdef NET_SKBUFF_DATA_USES_OFFSET
static inline unsigned char *skb_end_pointer(const struct sk_buff *skb)
{