SUNRPC: Add support for privacy to generic gss-api code.

 Add support for privacy to generic gss-api code.  This is dead code until we
 have both a mechanism that supports privacy and code in the client or server
 that uses it.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

include/linux/sunrpc/gss_api.h

@@ -48,6 +48,17 @@ u32 gss_verify_mic(
 		struct xdr_buf		*message,
 		struct xdr_netobj	*mic_token,
 		u32			*qstate);
+u32 gss_wrap(
+		struct gss_ctx		*ctx_id,
+		u32			qop,
+		int			offset,
+		struct xdr_buf		*outbuf,
+		struct page		**inpages);
+u32 gss_unwrap(
+		struct gss_ctx		*ctx_id,
+		u32			*qop,
+		int			offset,
+		struct xdr_buf		*inbuf);
 u32 gss_delete_sec_context(
 		struct gss_ctx		**ctx_id);
 
@@ -93,6 +104,17 @@ struct gss_api_ops {
 			struct xdr_buf		*message,
 			struct xdr_netobj	*mic_token,
 			u32			*qstate);
+	u32 (*gss_wrap)(
+			struct gss_ctx		*ctx_id,
+			u32			qop,
+			int			offset,
+			struct xdr_buf		*outbuf,
+			struct page		**inpages);
+	u32 (*gss_unwrap)(
+			struct gss_ctx		*ctx_id,
+			u32			*qop,
+			int			offset,
+			struct xdr_buf		*buf);
 	void (*gss_delete_sec_context)(
 			void			*internal_ctx_id);
 };

net/sunrpc/auth_gss/gss_mech_switch.c

@@ -276,6 +276,28 @@ gss_verify_mic(struct gss_ctx		*context_handle,
 				 qstate);
 }
 
+u32
+gss_wrap(struct gss_ctx	*ctx_id,
+	 u32		qop,
+	 int		offset,
+	 struct xdr_buf	*buf,
+	 struct page	**inpages)
+{
+	return ctx_id->mech_type->gm_ops
+		->gss_wrap(ctx_id, qop, offset, buf, inpages);
+}
+
+u32
+gss_unwrap(struct gss_ctx	*ctx_id,
+	   u32			*qop,
+	   int			offset,
+	   struct xdr_buf	*buf)
+{
+	return ctx_id->mech_type->gm_ops
+		->gss_unwrap(ctx_id, qop, offset, buf);
+}
+
+
 /* gss_delete_sec_context: free all resources associated with context_handle.
  * Note this differs from the RFC 2744-specified prototype in that we don't
  * bother returning an output token, since it would never be used anyway. */