WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-users

Re: [mdlabriola@xxxxxxxxx: [Xen-devel] Re: Re: [Xen-users] DomU routed t

To: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Subject: Re: [mdlabriola@xxxxxxxxx: [Xen-devel] Re: Re: [Xen-users] DomU routed traffic disappearing in vif.]
From: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
Date: Mon, 10 May 2010 16:32:33 +0100
Cc: "zary@xxxxxxxxx" <zary@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "xen-users@xxxxxxxxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxxxxxxxx>, "mdlabriola@xxxxxxxxx" <mdlabriola@xxxxxxxxx>
Delivery-date: Mon, 10 May 2010 08:33:25 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <20100510151835.GG29517@xxxxxxxxxxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
Organization: Citrix Systems, Inc.
References: <20100510151835.GG29517@xxxxxxxxxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
On Mon, 2010-05-10 at 16:18 +0100, Konrad Rzeszutek Wilk wrote:
> Ian had a patch that he backported from XCP that might fix this, not
> sure thought. 

If possible can someone who is seeing this issue try this patch:

--- 

xen/netback: correctly setup skb->ip_summed on receive

In 2.6.18 CHECKSUM_PARTIAL and CHECKSUM_UNNECESSARY were both synonyms for
CHECKSUM_HW. This is no longer the case and we need to select the correct one.

  data_validated csum_blank -> ip_summed
  0              0             CHECKSUM_NONE
  0              1             CHECKSUM_PARTIAL
  1              0             CHECKSUM_UNNECESSARY
  1              1             CHECKSUM_PARTIAL

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>

diff -r 3a1424756f50 drivers/xen/netback/netback.c
--- a/drivers/xen/netback/netback.c     Fri May 07 14:38:37 2010 +0100
+++ b/drivers/xen/netback/netback.c     Fri May 07 14:40:31 2010 +0100
@@ -1384,14 +1384,10 @@
                        netif_idx_release(pending_idx);
                }
 
-               /*
-                * Old frontends do not assert data_validated but we
-                * can infer it from csum_blank so test both flags.
-                */
-               if (txp->flags & (NETTXF_data_validated|NETTXF_csum_blank))
+               if (txp->flags & NETTXF_csum_blank)
                        skb->ip_summed = CHECKSUM_PARTIAL;
-               else
-                       skb->ip_summed = CHECKSUM_NONE;
+               else if (txp->flags & NETTXF_data_validated)
+                       skb->ip_summed = CHECKSUM_UNNECESSARY;
 
                netbk_fill_frags(skb);
 



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel