diff mbox

[net-next,4/5] udp: Add try convert checksum is case of skb_steal_sock

Message ID 1410153989-23837-5-git-send-email-therbert@google.com
State Changes Requested, archived
Delegated to: David Miller
Headers show

Commit Message

Tom Herbert Sept. 8, 2014, 5:26 a.m. UTC 
If an skb already has an associated socket that we can steal
in UDP receive then attempt checksum conversion before calling
udp_queue_rcv_skb.

Signed-off-by: Tom Herbert <therbert@google.com>
---
 net/ipv4/udp.c | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index cd0db54..50d3b5c 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1769,6 +1769,10 @@  int __udp4_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
 		if (unlikely(sk->sk_rx_dst != dst))
 			udp_sk_rx_dst_set(sk, dst);
 
+		if (udp_sk(sk)->convert_csum && uh->check && !IS_UDPLITE(sk))
+			skb_checksum_try_convert(skb, IPPROTO_UDP, uh->check,
+						 inet_compute_pseudo);
+
 		ret = udp_queue_rcv_skb(sk, skb);
 		sock_put(sk);
 		/* a return value > 0 means to resubmit the input, but