xfrm: Add Traffic Flow Confidentiality padding XFRM attribute

The XFRMA_TFCPAD attribute for XFRM state installation configures
Traffic Flow Confidentiality by padding ESP packets to a specified
length.

Signed-off-by: Martin Willi <martin@strongswan.org>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/xfrm.h b/include/linux/xfrm.h
index b971e3848493..930fdd2de79c 100644
--- a/include/linux/xfrm.h
+++ b/include/linux/xfrm.h
@@ -283,6 +283,7 @@ enum xfrm_attr_type_t {
         XFRMA_KMADDRESS,        /* struct xfrm_user_kmaddress */
         XFRMA_ALG_AUTH_TRUNC,   /* struct xfrm_algo_auth */
         XFRMA_MARK,             /* struct xfrm_mark */
+        XFRMA_TFCPAD,           /* __u32 */
         __XFRMA_MAX
 
 #define XFRMA_MAX (__XFRMA_MAX - 1)