On 03/02/2011 12:03 PM, Patrick McHardy wrote: > Am 01.03.2011 21:04, schrieb Daniel Lezcano: >> On 03/01/2011 05:51 PM, Patrick McHardy wrote: >>>> Patrick, do you have any suggestions to fix this ? >>> Since the frames are only looped back locally, I suppose the easiest >>> fix would be to mark them with CHECKSUM_UNNECESSARY. Alternatively >>> we need to complete the checksum manually, similar to what >>> dev_hard_start_xmit() does. >> That sounds very simple to fix, maybe too much simple :) >> >> I did the following change: >> >> --- linux-next.orig/drivers/net/macvlan.c >> +++ linux-next/drivers/net/macvlan.c >> @@ -222,6 +222,7 @@ static int macvlan_queue_xmit(struct sk_ >> >> if (vlan->mode == MACVLAN_MODE_BRIDGE) { >> const struct ethhdr *eth = (void *)skb->data; >> + skb->ip_summed = CHECKSUM_UNNECESSARY; >> >> /* send to other bridge ports directly */ >> if (is_multicast_ether_addr(eth->h_dest)) { >> >> >> and that fixed the problem. Do you think it is acceptable ? > The only problem I see is if the packets are bridged to a > different networking device (or redirected using the mirred > action), in this case the checksum will not be completed. > This would be a very strange setup though and probably wouldn't > be using dummy as lower device, so I'm not sure we have to > worry about this case.
I am not sure to get it, do you say the patch is correct ? If my understanding is correct, the packet will be flagged CHECKSUM_UNNECESSARY only for the macvlan devices, right ? By the way, this problem occurs for any lower device with offloading capabilities with a macvlan port in bridge mode. Thanks -- Daniel <javascript:void(0);> ------------------------------------------------------------------------------ Free Software Download: Index, Search & Analyze Logs and other IT data in Real-Time with Splunk. Collect, index and harness all the fast moving IT data generated by your applications, servers and devices whether physical, virtual or in the cloud. Deliver compliance at lower cost and gain new business insights. http://p.sf.net/sfu/splunk-dev2dev _______________________________________________ Lxc-users mailing list Lxc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lxc-users