On 03/24/2016 10:33 PM, Cong Wang wrote:
Here we go:diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index 1ecfa71..ab66080 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -1925,6 +1925,7 @@ static int packet_sendmsg_spkt(struct socket *sock, struct msghdr *msg, goto out_unlock; } + skb->ip_summed = CHECKSUM_UNNECESSARY; skb->protocol = proto; skb->dev = dev; skb->priority = sk->sk_priority; @@ -2496,6 +2497,7 @@ static int tpacket_fill_skb(struct packet_sock *po, struct sk_buff *skb, ph.raw = frame; + skb->ip_summed = CHECKSUM_UNNECESSARY; skb->protocol = proto; skb->dev = dev; skb->priority = po->sk.sk_priority; @@ -2805,6 +2807,7 @@ static struct sk_buff *packet_alloc_skb(struct sock *sk, size_t prepad, skb_put(skb, linear); skb->data_len = len - linear; skb->len += len - linear; + skb->ip_summed = CHECKSUM_UNNECESSARY; return skb; }
I have tested UDP, TCP, TCPv6 and custom Ethernet frames across a veth pair. And, UDP, TCP, and pktgen across a pair of veth pairs bridged by my user-space packet filter. All of these tests work fine with your patch as far as I can tell. So, you can add: Tested-by: Ben Greear <gree...@candelatech.com> That said, it could easily break some drivers and/or other scenarios that I have not tested, so at the least it should cook a while upstream before going into the stable tree.... Thanks, Ben -- Ben Greear <gree...@candelatech.com> Candela Technologies Inc http://www.candelatech.com
