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datapath: Improve compat rxhash functionality.

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Following patch improves rxhash calculation, It is taken from
upstream Linux kernel code.
From kernel 3.8, skb_get_rxhash() can handle hardware generated
l4-rxhash. Therefore compat skb_get_rxhash() is not used on
kernel 3.8 or new.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Reviewed-by: Thomas Graf <tgraf@redhat.com>
Acked-by: Jesse Gross <jesse@nicira.com>
This commit is contained in:
Pravin B Shelar
2013-12-03 08:33:36 -08:00
parent 3a5edd799e
commit 1653f445b3
4 changed files with 82 additions and 23 deletions
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21
datapath/linux/compat/utils.c
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@@ -37,3 +37,24 @@ void inet_proto_csum_replace16(__sum16 *sum, struct sk_buff *skb,
csum_unfold(*sum)));
}
#endif
bool __net_get_random_once(void *buf, int nbytes, bool *done,
atomic_t *done_key)
{
static DEFINE_SPINLOCK(lock);
unsigned long flags;
spin_lock_irqsave(&lock, flags);
if (*done) {
spin_unlock_irqrestore(&lock, flags);
return false;
}
get_random_bytes(buf, nbytes);
*done = true;
spin_unlock_irqrestore(&lock, flags);
atomic_set(done_key, 1);
return true;
}