[UDP]: Defer InDataGrams increment until recvmsg() does checksum
Thanks dave, herbert, gerrit, andi and other people for your
discussion about this problem.
UdpInDatagrams can be confusing because it counts packets that
might be dropped later.
Move UdpInDatagrams into recvmsg() as allowed by the RFC.
Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index ee1cc3f..b0474a6 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -164,6 +164,8 @@
if (err)
goto out_free;
+ UDP6_INC_STATS_USER(UDP_MIB_INDATAGRAMS, is_udplite);
+
sock_recv_timestamp(msg, sk, skb);
/* Copy the address. */
@@ -292,7 +294,7 @@
UDP6_INC_STATS_BH(UDP_MIB_RCVBUFERRORS, up->pcflag);
goto drop;
}
- UDP6_INC_STATS_BH(UDP_MIB_INDATAGRAMS, up->pcflag);
+
return 0;
drop:
UDP6_INC_STATS_BH(UDP_MIB_INERRORS, up->pcflag);
