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authorAlexander Duyck <aduyck@mirantis.com>2016-05-18 10:44:47 -0700
committerDavid S. Miller <davem@davemloft.net>2016-05-20 19:25:52 -0400
commit6a5536810180bb2c739df890a36cfa29da1914eb (patch)
tree5c66ca79e655ffab486f9c82a73980585996f565 /net
parent9a0351dfca14b44443a98c0cafe4de234d1ba469 (diff)
downloadlinux-sh-6a5536810180bb2c739df890a36cfa29da1914eb.tar.gz
ip6_gre: Do not allow segmentation offloads GRE_CSUM is enabled with FOU/GUE
This patch addresses the same issue we had for IPv4 where enabling GRE with an inner checksum cannot be supported with FOU/GUE due to the fact that they will jump past the GRE header at it is treated like a tunnel header. Signed-off-by: Alexander Duyck <aduyck@mirantis.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv6/ip6_gre.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index 6fb1b89d0178..af503f518278 100644
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -1355,11 +1355,15 @@ static int ip6gre_newlink(struct net *src_net, struct net_device *dev,
dev->hw_features |= GRE6_FEATURES;
if (!(nt->parms.o_flags & TUNNEL_SEQ)) {
- /* TCP segmentation offload is not supported when we
- * generate output sequences.
+ /* TCP offload with GRE SEQ is not supported, nor
+ * can we support 2 levels of outer headers requiring
+ * an update.
*/
- dev->features |= NETIF_F_GSO_SOFTWARE;
- dev->hw_features |= NETIF_F_GSO_SOFTWARE;
+ if (!(nt->parms.o_flags & TUNNEL_CSUM) ||
+ (nt->encap.type == TUNNEL_ENCAP_NONE)) {
+ dev->features |= NETIF_F_GSO_SOFTWARE;
+ dev->hw_features |= NETIF_F_GSO_SOFTWARE;
+ }
/* Can use a lockless transmit, unless we generate
* output sequences