include/modules.h

/*
 *  Copyright (C) 2000-2008, Parallels, Inc. All rights reserved.
 *
 *  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	_MODULES_H_
#define _MODULES_H_

#include "types.h"
#include "res.h"

#define	TYPE_CMD	0
#define	TYPE_CONF	1

#define MOD_DIR		PKGLIBDIR "/modules/"

#define MOD_INFO_SYM    "vz_get_mod_info"

#define MOD_IDBITS	16
#define MOD2ID(id)	(id << MOD_IDBITS)
#define MOD_PARAM2ID(m_id, p_id)				\
			(MOD2ID(m_id) | (0xffff & p_id))
#define PARAM2MOD(x)	(x >> MOD_IDBITS)

#define GET_MOD_INFO(name)		\
struct mod_info *vz_get_mod_info()	\
{					\
	return &name;			\
}

typedef struct {
	void *cfg;
	void *opt;
} data_param;

struct mod_info {
	void *handle;
	char **actions;
	int id;
	char *desc;
	data_param *(*alloc_data)(void);
	int (*init)(data_param *data);
	int (*parse_cfg)(envid_t veid, data_param *data, const char *name,
		const char *rval);
	int (*parse_opt)(envid_t veid, data_param *data, int opt,
		const char *rval);
	int (*store)(data_param *data, list_head_t *conf_head);
	int (*setup)(vps_handler *h, envid_t veid, data_param *data,
		int vps_state, int skip, vps_param *param);
	int (*cleanup)(vps_handler *h, envid_t veid, data_param *data,
		vps_param *param);
	void (*free_data)(data_param *data);
	struct option *(*get_opt)(data_param *data, const char *action);
	const char *(*get_usage)();
};

struct mod {
	char *fname;
	data_param *data;
	struct mod_info *mod_info;
};

struct mod_action {
	int mod_count;
	char *action;
	struct mod *mod_list;
};

struct option *mod_make_opt(struct option *opt, struct mod_action *action,
	const char *name);
int mod_save_config(struct mod_action *action, list_head_t *conf);
int mod_parse(envid_t veid, struct mod_action *action, const char *name,
	int opt, const char *rval);
int mod_setup(vps_handler *h, envid_t veid, int vps_state, skipFlags skip,
	struct mod_action *action, vps_param *param);
int mod_cleanup(vps_handler *h, envid_t veid, struct mod_action *action,
	vps_param *param);
int is_mod_action(struct mod_info *info, const char *name);
void mod_print_usage(struct mod_action *action);

#endif	/* _MODULES_H_ */