diff mbox

gso: Attempt to handle mega-GRO packets

Message ID 20131106123900.GA20259@gondor.apana.org.au
State RFC, archived
Delegated to: David Miller
Headers show

Commit Message

Herbert Xu Nov. 6, 2013, 12:39 p.m. UTC 
On Wed, Nov 06, 2013 at 09:30:38AM +0800, Herbert Xu wrote:
> Here is a totally untested patch that tries to trivially process
> these new frags + frag_list skbs.  It should actually be trivial
> to make this generate TSO packets by just adding a gso_ok check
> and short-circuit.

That patch obviously didn't have a chance of working since I missed
a continue.

Here is a better version.


Cheers,
diff mbox

Patch

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 3735fad..409bd9b 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -2816,7 +2816,31 @@  struct sk_buff *skb_segment(struct sk_buff *skb, netdev_features_t features)
 			hsize = len;
 
 		if (!hsize && i >= nfrags) {
-			BUG_ON(fskb->len != len);
+			if (fskb->len != len) {
+				SKB_FRAG_ASSERT(fskb);
+
+				nskb = skb_segment(fskb, features);
+
+				err = PTR_ERR(nskb);
+				if (IS_ERR(nskb))
+					goto err;
+				err = -ENOMEM;
+
+				if (segs)
+					tail->next = nskb;
+				else
+					segs = nskb;
+
+				tail = nskb;
+				while (tail->next)
+					tail = tail->next;
+
+				BUG_ON(fskb->next && tail->len != len);
+
+				len = fskb->len;
+				fskb = fskb->next;
+				continue;
+			}
 
 			pos += len;
 			nskb = skb_clone(fskb, GFP_ATOMIC);