Re: 2.4.0-pre3+zerocopy: weird messages

[David S. Miller]

Petru Paler writes:
 > > Oh, I think I know why this happens.  Can you add this patch, and next
 > > time the UDP bad csum message appears, tell me if it says "UDP packet
 > > with bad csum was fragmented." in the next line of your syslog
 > > messages?  Thanks.
 > 
 > Sure, but I also need the actual patch :)

Duh, here it is :-)

--- net/ipv4/udp.c.~1~	Thu Jan 11 10:20:40 2001
+++ net/ipv4/udp.c	Sun Jan 14 02:58:07 2001
@@ -855,6 +855,8 @@
 		if (!udp_check(uh, ulen, saddr, daddr, skb->csum))
 			return 0;
 		NETDEBUG(printk(KERN_DEBUG "udp v4 hw csum failure.\n"));
+		if (skb_shinfo(skb)->frag_list != NULL)
+			printk(KERN_DEBUG "UDP packet with bad csum was fragmented.\n");
 		skb->ip_summed = CHECKSUM_NONE;
 	}
 	if (skb->ip_summed != CHECKSUM_UNNECESSARY)