#ifndef _PRIO_H

#define _PRIO_H

/*

 * knowing about path struct gives flexibility to prioritizers

 */

#include "checkers.h"

#include "vector.h"

/* forward declaration to avoid circular dependency */

struct path;

#include "list.h"

#include "memory.h"

#include "defaults.h"

/*

 * Known prioritizers for use in hwtable.c

 */

#define PRIO_ALUA		"alua"

#define PRIO_CONST		"const"

#define PRIO_DATACORE		"datacore"

#define PRIO_EMC		"emc"

#define PRIO_HDS		"hds"

#define PRIO_HP_SW		"hp_sw"

#define PRIO_IET		"iet"

#define PRIO_ONTAP		"ontap"

#define PRIO_RANDOM		"random"

#define PRIO_RDAC		"rdac"

#define PRIO_WEIGHTED_PATH	"weightedpath"

#define PRIO_SYSFS		"sysfs"

#define PRIO_PATH_LATENCY	"path_latency"

#define PRIO_ANA		"ana"

/*

 * Value used to mark the fact prio was not defined

 */

#define PRIO_UNDEF -1

/*

 * strings lengths

 */

#define LIB_PRIO_NAMELEN 255

#define PRIO_NAME_LEN 16

#define PRIO_ARGS_LEN 255

struct prio {

	void *handle;

	int refcount;

	struct list_head node;

	char name[PRIO_NAME_LEN];

	char args[PRIO_ARGS_LEN];

	int (*getprio)(struct path *, char *, unsigned int);

};

unsigned int get_prio_timeout(unsigned int checker_timeout,

			      unsigned int default_timeout);

int init_prio (char *);

void cleanup_prio (void);

struct prio * add_prio (char *, char *);

int prio_getprio (struct prio *, struct path *, unsigned int);

void prio_get (char *, struct prio *, char *, char *);

void prio_put (struct prio *);

int prio_selected (const struct prio *);

const char * prio_name (const struct prio *);

const char * prio_args (const struct prio *);

int prio_set_args (struct prio *, const char *);

/* The only function exported by prioritizer dynamic libraries (.so) */

int getprio(struct path *, char *, unsigned int);

#endif /* _PRIO_H */