On Tue, Oct 27, 2015, at 17:36, Tom Herbert wrote:> > -               if
(cork->length + length > maxnonfragsize - headersize) {

quoted

+       if (cork->length + length > maxnonfragsize - headersize) {
 emsgsize:
-                       ipv6_local_error(sk, EMSGSIZE, fl6,
-                                        mtu - headersize +
-                                        sizeof(struct ipv6hdr));
-                       return -EMSGSIZE;
-               }
+               ipv6_local_error(sk, EMSGSIZE, fl6,
+                                mtu - headersize +
+                                sizeof(struct ipv6hdr));
+               return -EMSGSIZE;
        }

+       /* CHECKSUM_PARTIAL only with no extension headers and when

No, please don't do this. CHECKSUM_PARTIAL should work with extension
headers as defined, so this is just disabling otherwise valid and
useful functionality. If (some) drivers have problems with this they
need to be identified and fixed.

I don't understand. The old code already didn't allow the use of
opt_flen with CHECKSUM_PARTIAL.

The MSG_MORE check has nothing to do with that but only with corking.

Bye,
Hannes