X-Git-Url: https://git.decadent.org.uk/gitweb/?p=nfs-utils.git;a=blobdiff_plain;f=support%2Fnfs%2Frmtab.c;h=a28abf343898791b415336d36ef67c4977063d5f;hp=b7be6ba6b0a86ae7353872d30c907026be27f0a6;hb=7b0e4faaf3169c69828d3f7769ed8ce9142e100b;hpb=ba4a2465e10c1373c910d81606ca61f4fc87d90f

diff --git a/support/nfs/rmtab.c b/support/nfs/rmtab.c
index b7be6ba..a28abf3 100644
--- a/support/nfs/rmtab.c
+++ b/support/nfs/rmtab.c
@@ -6,7 +6,9 @@
  * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
  */
 
-#include "config.h"
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
 
 #include <sys/fcntl.h>
 #include <stdlib.h>
@@ -115,11 +117,24 @@ void
 fendrmtabent(FILE *fp)
 {
 	if (fp) {
-		/* If it was written to, we really want
-		 * to flush to disk before returning
-		 */
-		fflush(fp);
-		fdatasync(fileno(fp));
+		static int have_new_cache = -1;
+		if (have_new_cache == -1) /* check only once */
+			have_new_cache = check_new_cache();
+
+		if (!have_new_cache) {
+			/*
+			 * If we are using the old caching interface: exportfs
+			 * uses the rmtab to determine what should be exported,
+			 * so it is important that it be up-to-date.
+			 *
+			 * If we are using the new caching interface: the rmtab
+			 * is ignored by exportfs and the fdatasync only serves
+			 * to slow us down.
+			 */
+			fflush(fp);
+			fdatasync(fileno(fp));
+		}
+
 		fclose(fp);
 	}
 }