xref: /freebsd-src/sbin/geom/core/geom.h (revision b3e7694832e81d7a904a10f525f8797b753bf0d3)

/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
 * All rights reserved.
 *
 * 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 AUTHORS 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 AUTHORS 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.
 */

#ifndef _GEOM_H_
#define	_GEOM_H_
#define	G_LIB_VERSION	5

/*
 * The G_FLAG_VERBOSE flag on a command specification means that the
 * command will accept a -v option and the GEOM framework will print
 * out status information after the command when it is run with -v.
 * Additionally a GEOM command can explicitly specify a -v option and
 * handle it as it would any other option. If both a -v option and
 * G_FLAG_VERBOSE are specified for a command then both types of verbose
 * information will be output when that command is run with -v.
 *
 * When the G_FLAG_LOADKLD is specified for a command, the GEOM kernel
 * module will be loaded when that command is run if it has not yet been
 * loaded. This flag is typically specified for the `create' command.
 */
#define	G_FLAG_NONE	0x0000
#define	G_FLAG_VERBOSE	0x0001
#define	G_FLAG_LOADKLD	0x0002

#define	G_TYPE_NONE	0x00
#define	G_TYPE_BOOL	0x01
#define	G_TYPE_STRING	0x02
#define	G_TYPE_NUMBER	0x03
#define	G_TYPE_MASK	0x0f
#define	G_TYPE_DONE	0x10
#define	G_TYPE_MULTI	0x20
#define	G_TYPE_NUMMASK	0xff00
#define	G_TYPE_NUMSHIFT	8

#define	G_OPT_MAX	16
#define	G_OPT_DONE(opt)		do { (opt)->go_type |= G_TYPE_DONE; } while (0)
#define	G_OPT_ISDONE(opt)	((opt)->go_type & G_TYPE_DONE)
#define	G_OPT_ISMULTI(opt)	((opt)->go_type & G_TYPE_MULTI)
#define	G_OPT_TYPE(opt)		((opt)->go_type & G_TYPE_MASK)
#define	G_OPT_NUM(opt)		(((opt)->go_type & G_TYPE_NUMMASK) >> G_TYPE_NUMSHIFT)
#define	G_OPT_NUMINC(opt)	((opt)->go_type += (1 << G_TYPE_NUMSHIFT))

#define	G_VAL_OPTIONAL	((void *)-1)

#define G_OPT_SENTINEL	{ '\0', NULL, NULL, G_TYPE_NONE }
#define G_NULL_OPTS	{ G_OPT_SENTINEL }
#define	G_CMD_SENTINEL	{ NULL, 0, NULL, G_NULL_OPTS, NULL }

struct g_option {
	char		 go_char;
	const char	*go_name;
	const void	*go_val;
	unsigned	 go_type;
};

struct g_command {
	const char	*gc_name;
	unsigned	 gc_flags;
	void		(*gc_func)(struct gctl_req *, unsigned);
	struct g_option	gc_options[G_OPT_MAX];
	const char	*gc_usage;
};
#endif	/* !_GEOM_H_ */