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Re: [Xen-devel] [PATCH v3] core, nfqueue, openvswitch: Orphan frags in skb_zerocopy and handle errors

On 20/03/14 22:22, Thomas Graf wrote:
On 03/20/2014 05:02 PM, Zoltan Kiss wrote:
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -464,7 +464,9 @@ static int queue_userspace_packet(struct datapath
*dp, struct sk_buff *skb,
      nla->nla_len = nla_attr_size(skb->len);

-    skb_zerocopy(user_skb, skb, skb->len, hlen);
+    err = skb_zerocopy(user_skb, skb, skb->len, hlen);
+    if (err)
+        goto out;

      /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */
      if (!(dp->user_features & OVS_DP_F_UNALIGNED)) {
@@ -478,6 +480,7 @@ static int queue_userspace_packet(struct datapath
*dp, struct sk_buff *skb,

      err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb,
+    skb_tx_error(skb);

Really sorry to bug you again. We'll get this right ;-)

Patch looks great except for this call to skb_tx_error() which is now
done in the error *and* success path. Make the call conditional on
if (err) and we're good.
Ah, sorry, I'm really sloppy with this patch. I've sent a fixed one.


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