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| author | Krishna Kumar <krkumar2@in.ibm.com> | 2010-08-04 06:15:52 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-08-16 21:06:24 -0700 |
| commit | bfb564e7391340638afe4ad67744a8f3858e7566 (patch) | |
| tree | 7f079d9c3f020d52efb555db414476c463584967 /include/linux/skbuff.h | |
| parent | 6891dd25d3f82e50979b27fde1980aa96320b975 (diff) | |
| download | lwn-bfb564e7391340638afe4ad67744a8f3858e7566.tar.gz lwn-bfb564e7391340638afe4ad67744a8f3858e7566.zip | |
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.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 77eb60d2b496..d8050382b189 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) { |