diff options
| author |   Tom Herbert <therbert@google.com> | 2014-07-01 21:33:17 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-07-07 21:14:21 -0700 |
| commit | a3b18ddb9cc1056eea24e3edc1828cfb3fd0726f (patch) | |
| tree | 5100dd399922df55b29a1acf2b5a4dcc332c10b4 /net/core/flow_dissector.c | |
| parent | ipv6: Implement automatic flow label generation on transmit (diff) | |
| download | linux-dev-a3b18ddb9cc1056eea24e3edc1828cfb3fd0726f.tar.xz linux-dev-a3b18ddb9cc1056eea24e3edc1828cfb3fd0726f.zip | |
net: Only do flow_dissector hash computation once per packet
Add sw_hash flag to skbuff to indicate that skb->hash was computed
from flow_dissector. This flag is checked in skb_get_hash to avoid
repeatedly trying to compute the hash (ie. in the case that no L4 hash
can be computed).
Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/flow_dissector.c')
| -rw-r--r-- | net/core/flow_dissector.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c index c5f3912dad4c..5f362c1d0332 100644 --- a/net/core/flow_dissector.c +++ b/net/core/flow_dissector.c @@ -256,6 +256,8 @@ void __skb_get_hash(struct sk_buff *skb) if (keys.ports) skb->l4_hash = 1; + skb->sw_hash = 1; + skb->hash = __flow_hash_from_keys(&keys); } EXPORT_SYMBOL(__skb_get_hash); |