util-linux/util-linux-mount_opt_hotplug.patch

 mount/mount.8           |    7 +++++++
 mount/mount.c           |   15 +++++++++++++--
 mount/mount_constants.h |    3 +++
 3 files changed, 23 insertions(+), 2 deletions(-)

Index: util-linux-ng-2.12r+git20070330/mount/mount.8
===================================================================
--- util-linux-ng-2.12r+git20070330.orig/mount/mount.8
+++ util-linux-ng-2.12r+git20070330/mount/mount.8
@@ -572,6 +572,10 @@ This option implies the options
 (unless overridden by subsequent options, as in the option line
 .BR group,dev,suid ).
 .TP
+.B hotplug
+Do not report errors for this device if it doesn't exist.
+.BR fcntl (2).
+.TP
 .B mand
 Allow mandatory locks on this filesystem. See
 .BR fcntl (2).
@@ -602,6 +606,9 @@ Do not allow direct execution of any bin
 (Until recently it was possible to run binaries anyway using a command like
 /lib/ld*.so /mnt/binary. This trick fails since Linux 2.4.25 / 2.6.0.)
 .TP
+.B nohotplug
+Report an error if the device does not exist.
+.TP
 .B nomand
 Do not allow mandatory locks on this filesystem.
 .TP
Index: util-linux-ng-2.12r+git20070330/mount/mount.c
===================================================================
--- util-linux-ng-2.12r+git20070330.orig/mount/mount.c
+++ util-linux-ng-2.12r+git20070330/mount/mount.c
@@ -174,9 +174,14 @@ static const struct opt_map opt_map[] = 
   { "diratime",	0, 1, MS_NODIRATIME },	/* Update dir access times */
   { "nodiratime", 0, 0, MS_NODIRATIME },/* Do not update dir access times */
 #endif
+#ifdef MS_HOTPLUG
+  { "hotplug",	0, 0, MS_HOTPLUG },	/* Don't fail if ENOENT on dev */
+#endif
   { NULL,	0, 0, 0		}
 };
 
+static int option_hotplug; /* can not invent our own MS_FLAGS */
+
 static const char *opt_loopdev, *opt_vfstype, *opt_offset, *opt_encryption,
 	*opt_speed, *opt_comment;
 
@@ -269,6 +274,10 @@ parse_opt(const char *opt, int *mask, ch
 
 	for (om = opt_map; om->opt != NULL; om++)
 		if (streq (opt, om->opt)) {
+			if (om->mask & MS_HOTPLUG) {
+				option_hotplug = 1;
+				return;
+			}
 			if (om->inv)
 				*mask &= ~om->mask;
 			else
@@ -985,9 +994,11 @@ retry_nfs:
       else if (stat (node, &statbuf))
 	   error (_("mount: mount point %s is a symbolic link to nowhere"),
 		  node);
-      else if (stat (spec, &statbuf))
+      else if (stat (spec, &statbuf)) {
+	   if (option_hotplug)
+		goto out;
 	   error (_("mount: special device %s does not exist"), spec);
-      else {
+      } else {
 	   errno = mnt_err;
 	   perror("mount");
       }
Index: util-linux-ng-2.12r+git20070330/mount/mount_constants.h
===================================================================
--- util-linux-ng-2.12r+git20070330.orig/mount/mount_constants.h
+++ util-linux-ng-2.12r+git20070330/mount/mount_constants.h
@@ -57,6 +57,9 @@ if we have a stack or plain mount - moun
 #ifndef MS_VERBOSE
 #define MS_VERBOSE	0x8000	/* 32768 */
 #endif
+
+#define MS_HOTPLUG	(1<<18) /* Don't fail if ENOENT on the dev, mount internal */
+
 /*
  * Magic mount flag number. Had to be or-ed to the flag values.
  */