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authorTom Herbert <therbert@google.com>2014-11-04 20:06:56 +0300
committerDavid S. Miller <davem@davemloft.net>2014-11-06 00:30:03 +0300
commitb17f709a24013fcbb257f6f89b4d81ac9fdf0d18 (patch)
tree2d279bf83c7bdbe770a90f784b6c3e2b78e7237d /include/net/fou.h
parentc1aa8347e73e4092411fbd96cc59531fb7e76d04 (diff)
downloadlinux-b17f709a24013fcbb257f6f89b4d81ac9fdf0d18.tar.xz
gue: TX support for using remote checksum offload option
Add if_tunnel flag TUNNEL_ENCAP_FLAG_REMCSUM to configure remote checksum offload on an IP tunnel. Add logic in gue_build_header to insert remote checksum offload option. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/fou.h')
-rw-r--r--include/net/fou.h14
1 files changed, 13 insertions, 1 deletions
diff --git a/include/net/fou.h b/include/net/fou.h
index cf4ce8874f92..25b26ffcf1df 100644
--- a/include/net/fou.h
+++ b/include/net/fou.h
@@ -20,7 +20,19 @@ static size_t fou_encap_hlen(struct ip_tunnel_encap *e)
static size_t gue_encap_hlen(struct ip_tunnel_encap *e)
{
- return sizeof(struct udphdr) + sizeof(struct guehdr);
+ size_t len;
+ bool need_priv = false;
+
+ len = sizeof(struct udphdr) + sizeof(struct guehdr);
+
+ if (e->flags & TUNNEL_ENCAP_FLAG_REMCSUM) {
+ len += GUE_PLEN_REMCSUM;
+ need_priv = true;
+ }
+
+ len += need_priv ? GUE_LEN_PRIV : 0;
+
+ return len;
}
#endif