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GRO: Move netpoll checks to correct location

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As my netpoll fix for net doesn't really work for net-next, we
need this update to move the checks into the right place.  As it
stands we may pass freed skbs to netpoll_receive_skb.

This patch also introduces a netpoll_rx_on function to avoid GRO
completely if we're invoked through netpoll.  This might seem
paranoid but as netpoll may have an external receive hook it's
better to be safe than sorry.  I don't think we need this for
2.6.29 though since there's nothing immediately broken by it.

This patch also moves the GRO_* return values to netdevice.h since
VLAN needs them too (I tried to avoid this originally but alas
this seems to be the easiest way out).  This fixes a bug in VLAN
where it continued to use the old return value 2 instead of the
correct GRO_DROP.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2009-03-16 10:50:02 -07:00 • committed by David S. Miller
parent afece1c658
commit d1c76af9e2
4 changed files with 26 additions and 21 deletions
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11
include/linux/netpoll.h
View file

@ -63,6 +63,13 @@ static inline int netpoll_rx(struct sk_buff *skb)
return ret;
}
static inline int netpoll_rx_on(struct sk_buff *skb)
{
struct netpoll_info *npinfo = skb->dev->npinfo;
return npinfo && (npinfo->rx_np || npinfo->rx_flags);
}
static inline int netpoll_receive_skb(struct sk_buff *skb)
{
if (!list_empty(&skb->dev->napi_list))
@ -99,6 +106,10 @@ static inline int netpoll_rx(struct sk_buff *skb)
{
return 0;
}
static inline int netpoll_rx_on(struct sk_buff *skb)
{
return 0;
}
static inline int netpoll_receive_skb(struct sk_buff *skb)
{
return 0;