netbsd dirent.h, import sys/sys *.h, mfs cleanup

. add all sys/sys headers not already present to help compiling
	. take netbsd dirent.h and struct dirent; main result is
	  introducing d_type and d_namlen that have to be set by getdents()
	  in all FS code implementing it
	. d_off is gone
	. alignment of the struct has become 8 bytes instead of 4
	. remove _MAX_BLOCK_SIZE, _MIN_BLOCK_SIZE, _STATIC_BLOCK_SIZE
	. libminlib: cleanup unused yet duplicate code
	. mfs: throw out the long-broken v1, v2 support
	. new test for dirent contents filled by getdents()

Change-Id: I1459755c7ba5e5d1c9396d3a587ce6e63ddc283e

sys/sys/syncobj.h

@@ -0,0 +1,65 @@
+/*	$NetBSD: syncobj.h,v 1.8 2009/10/21 21:12:07 rmind Exp $	*/
+
+/*-
+ * Copyright (c) 2007, 2008 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Andrew Doran.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#if !defined(_SYS_SYNCOBJ_H_)
+#define	_SYS_SYNCOBJ_H_
+
+struct lwp;
+
+typedef volatile const void *wchan_t;
+
+#if defined(_KERNEL)
+
+/*
+ * Synchronisation object operations set.
+ */
+typedef struct syncobj {
+	u_int	sobj_flag;
+	void	(*sobj_unsleep)(struct lwp *, bool);
+	void	(*sobj_changepri)(struct lwp *, pri_t);
+	void	(*sobj_lendpri)(struct lwp *, pri_t);
+	struct lwp *(*sobj_owner)(wchan_t);
+} syncobj_t;
+
+struct lwp *syncobj_noowner(wchan_t);
+
+#define	SOBJ_SLEEPQ_SORTED	0x01
+#define	SOBJ_SLEEPQ_FIFO	0x02
+#define	SOBJ_SLEEPQ_LIFO	0x04
+
+extern syncobj_t	sched_syncobj;
+extern syncobj_t	mutex_syncobj;
+extern syncobj_t	rw_syncobj;
+extern syncobj_t	sleep_syncobj;
+
+#endif /* defined(_KERNEL) */
+
+#endif /* !_SYS_SYNCOBJ_H_ */