Merging upstream version 4.2+20231121.

Signed-off-by: Daniel Baumann <daniel@debian.org>

udev.h

@@ -0,0 +1,40 @@
+/*
+ * mdadm - manage Linux "md" devices aka RAID arrays.
+ *
+ * Copyright (C) 2022 Mateusz Grzonka <mateusz.grzonka@intel.com>
+ *
+ *    This program is free software; you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation; either version 2 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program; if not, write to the Free Software
+ *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef MONITOR_UDEV_H
+#define MONITOR_UDEV_H
+
+enum udev_status {
+	UDEV_STATUS_ERROR_NO_UDEV = -2,
+	UDEV_STATUS_ERROR,
+	UDEV_STATUS_SUCCESS = 0,
+	UDEV_STATUS_TIMEOUT
+};
+
+bool udev_is_available(void);
+
+#ifndef NO_LIBUDEV
+enum udev_status udev_wait_for_events(int seconds);
+#endif
+
+enum udev_status udev_block(char *devnm);
+void udev_unblock(void);
+
+#endif