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authorAlexander Drozdov <al.drozdov@gmail.com>2015-03-23 09:11:12 +0300
committerDavid S. Miller <davem@davemloft.net>2015-03-23 22:00:36 -0400
commit68c2e5de360411674d9821ee2b46f5d8ee965161 (patch)
treee68cac5be8d3c5fb6e5b47c48e48bd9c8703e8de
parentc69736696cf3742b37d850289dc0d7ead177bb14 (diff)
af_packet: make tpacket_rcv to not set status value before run_filter
It is just an optimization. We don't need the value of status variable if the packet is filtered. Signed-off-by: Alexander Drozdov <al.drozdov@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/packet/af_packet.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index b91ac5946ad1..9d854c5ce0b5 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1916,14 +1916,15 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev,
}
}
- if (skb->ip_summed == CHECKSUM_PARTIAL)
- status |= TP_STATUS_CSUMNOTREADY;
-
snaplen = skb->len;
res = run_filter(skb, sk, snaplen);
if (!res)
goto drop_n_restore;
+
+ if (skb->ip_summed == CHECKSUM_PARTIAL)
+ status |= TP_STATUS_CSUMNOTREADY;
+
if (snaplen > res)
snaplen = res;