security: add reserved bit fields

In struct rte_security_ipsec_sa_options, for every new option
added, there is an ABI breakage, to avoid, a reserved_opts
bitfield is added to for the remaining bits available in the
structure.
Now for every new sa option, these reserved_opts can be reduced
and new option can be added.

Signed-off-by: Akhil Goyal <gakhil@marvell.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
Acked-by: Ray Kinsella <mdr@ashroe.eu>

diff --git a/lib/security/rte_security.h b/lib/security/rte_security.h
index 17d0e95..4c55dcd 100644 (file)
--- a/lib/security/rte_security.h
+++ b/lib/security/rte_security.h
@@ -263,6 +263,15 @@ struct rte_security_ipsec_sa_options {
         * PKT_TX_UDP_CKSUM or PKT_TX_L4_MASK in mbuf.
         */
        uint32_t l4_csum_enable : 1;
+
+       /** Reserved bit fields for future extension
+        *
+        * User should ensure reserved_opts is cleared as it may change in
+        * subsequent releases to support new options.
+        *
+        * Note: Reduce number of bits in reserved_opts for every new option.
+        */
+       uint32_t reserved_opts : 18;
 };
 
 /** IPSec security association direction */