kadmind: Add -A option for async HDB writes

kadmin/kadmind.c

@@ -48,6 +48,7 @@ static char *fuzz_keytab_name;
 static char *fuzz_service_name;
 static char *fuzz_admin_server;
 #endif
+int async_flag;
 static int help_flag;
 static int version_flag;
 static int debug_flag;
@@ -71,6 +72,7 @@ static struct getargs args[] = {
     {	"realm",	'r',	arg_string,   &realm,
 	"realm to use", "realm"
     },
+    {	"async", 'A', arg_flag, &async_flag, "do not fsync HDB writes", NULL },
 #ifdef HAVE_DLOPEN
     { "check-library", 0, arg_string, &check_library,
       "library to load password check function from", "library" },

kadmin/rpc.c

@@ -37,6 +37,8 @@
 #include <gssapi_krb5.h>
 #include <gssapi_spnego.h>
 
+extern int async_flag;
+
 #define CHECK(x)							\
 	do {								\
 		int __r;						\
@@ -1029,6 +1031,8 @@ process_stream(krb5_context contextp,
 						     0, 0,
 						     &server_handle);
 		INSIST(ret == 0);
+                if (async_flag)
+                    realm_params.mask |= KADM5_CONFIG_ASYNC_HDB_WRITES;
 	    }
 
 	    INSIST(gctx.ctx != GSS_C_NO_CONTEXT);

kadmin/server.c

@@ -34,6 +34,8 @@
 #include "kadmin_locl.h"
 #include <krb5-private.h>
 
+extern int async_flag;
+
 static kadm5_ret_t check_aliases(kadm5_server_context *,
                                  kadm5_principal_ent_rec *,
                                  kadm5_principal_ent_rec *);
@@ -1111,6 +1113,8 @@ handle_v5(krb5_context contextp,
             krb5_free_ticket(contextp, ticket);
             return;
         }
+        if (async_flag)
+            realm_params.mask |= KADM5_CONFIG_ASYNC_HDB_WRITES;
     }
 
     initial = ticket->ticket.flags.initial;