[dpdk-dev] [PATCH v3 2/2] security: add reserved bitfields

[Akhil Goyal <gakhil@marvell.com>]

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>
---
v3:
- added a comment for requesting user to clear reserved_opts.
- removed LIST_END enumerators patch. It will be handled separately.


 lib/security/rte_security.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/security/rte_security.h b/lib/security/rte_security.h
index 17d0e95412..4c55dcd744 100644
--- 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 */
-- 
2.25.1