OpenZFS restructuring - libspl

Factor Linux specific pieces out of libspl.

Reviewed-by: Ryan Moeller <ryan@ixsystems.com>
Reviewed-by: Sean Eric Fagan <sef@ixsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Matt Macy <mmacy@FreeBSD.org>
Closes #9336

lib/libspl/include/os/linux/sys/param.h

@@ -0,0 +1,67 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _LIBSPL_SYS_PARAM_H
+#define	_LIBSPL_SYS_PARAM_H
+
+#include_next <sys/param.h>
+#include <unistd.h>
+
+/*
+ * File system parameters and macros.
+ *
+ * The file system is made out of blocks of at most MAXBSIZE units,
+ * with smaller units (fragments) only in the last direct block.
+ * MAXBSIZE primarily determines the size of buffers in the buffer
+ * pool. It may be made larger without any effect on existing
+ * file systems; however making it smaller may make some file
+ * systems unmountable.
+ *
+ * Note that the blocked devices are assumed to have DEV_BSIZE
+ * "sectors" and that fragments must be some multiple of this size.
+ */
+#define	MAXBSIZE	8192
+#define	DEV_BSIZE	512
+#define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
+
+#define	MAXNAMELEN	256
+#define	MAXOFFSET_T	LLONG_MAX
+
+#define	UID_NOBODY	60001		/* user ID no body */
+#define	GID_NOBODY	UID_NOBODY
+#define	UID_NOACCESS	60002		/* user ID no access */
+
+#define	MAXUID		UINT32_MAX	/* max user id */
+#define	MAXPROJID	MAXUID		/* max project id */
+
+#ifdef	PAGESIZE
+#undef	PAGESIZE
+#endif /* PAGESIZE */
+
+extern size_t spl_pagesize(void);
+#define	PAGESIZE	(spl_pagesize())
+
+#endif