nicira-ext: Add size check for struct nx_role_request.

We try to have such a size check every protocol structure.

Signed-off-by: Ben Pfaff <blp@nicira.com>

diff --git a/include/openflow/nicira-ext.h b/include/openflow/nicira-ext.h
index 69218037f66ea7db9822eaf718ebaf75b0b88376..62180a729afded247faaa4e555d94e9c5e5b4ad3 100644 (file)
--- a/include/openflow/nicira-ext.h
+++ b/include/openflow/nicira-ext.h
@@ -276,6 +276,7 @@ struct nx_role_request {
     struct nicira_header nxh;
     ovs_be32 role;              /* One of NX_ROLE_*. */
 };
+OFP_ASSERT(sizeof(struct nx_role_request) == 20);
 
 enum nx_role {
     NX_ROLE_OTHER,              /* Default role, full access. */