alua.h

/*
 * Copyright (c) 2017 Red Hat, Inc.
 *
 * This file is licensed to you under your choice of the GNU Lesser
 * General Public License, version 2.1 or any later version (LGPLv2.1 or
 * later), or the Apache License 2.0.
 */

#ifndef __TCMU_ALUA_H
#define __TCMU_ALUA_H

#include "ccan/list/list.h"

struct tcmu_device;
struct tcmulibc_cmd;

struct alua_grp {
	/* ALUA spec values */
	uint8_t state;
	uint8_t supported_states;
	uint8_t tpgs;
	uint8_t status;
	uint8_t implicit_trans_secs;
	bool pref;
	uint16_t id;

	/* LIO settings */
	char *name;
	unsigned nonop_delay_msecs;
	unsigned trans_delay_msecs;

	struct tcmu_device *dev;
	uint8_t num_tgt_ports;
	/* entry on list returned by lib */
	struct list_node entry;
	struct list_head tgt_ports;
};

int tcmu_emulate_report_tgt_port_grps(struct tcmu_device *dev,
				      struct list_head *group_list,
				      struct tcmulib_cmd *cmd);
int tcmu_emulate_set_tgt_port_grps(struct tcmu_device *dev,
				   struct list_head *group_list,
				   struct tcmulib_cmd *cmd);
struct tgt_port *tcmu_get_enabled_port(struct list_head *);
int tcmu_get_alua_grps(struct tcmu_device *, struct list_head *);
void tcmu_release_alua_grps(struct list_head *);
int alua_implicit_transition(struct tcmu_device *dev, struct tcmulib_cmd *cmd,
			     bool is_read);
bool lock_is_required(struct tcmu_device *dev);
int alua_check_state(struct tcmu_device *dev, struct tcmulib_cmd *cmd, bool is_read);

#endif