/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * RDMA Network Block Driver
 *
 * Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved.
 * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved.
 * Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved.
 */
#ifndef RNBD_SRV_H
#define RNBD_SRV_H

#include <linux/types.h>
#include <linux/idr.h>
#include <linux/kref.h>

#include <rtrs.h>
#include "rnbd-proto.h"
#include "rnbd-log.h"

struct rnbd_srv_session {
        /* Entry inside global sess_list */
        struct list_head        list;
        struct rtrs_srv_sess    *rtrs;
        char                    sessname[NAME_MAX];
        int                     queue_depth;

        struct xarray           index_idr;
        struct mutex            lock;
        u8                      ver;
};

struct rnbd_srv_dev {
        /* Entry inside global dev_list */
        struct list_head                list;
        struct kobject                  dev_kobj;
        struct kobject                  *dev_sessions_kobj;
        struct kref                     kref;
        char                            name[NAME_MAX];
        /* List of rnbd_srv_sess_dev structs */
        struct list_head                sess_dev_list;
        struct mutex                    lock;
        int                             open_write_cnt;
};

/* Structure which binds N devices and N sessions */
struct rnbd_srv_sess_dev {
        /* Entry inside rnbd_srv_dev struct */
        struct list_head                dev_list;
        struct file                     *bdev_file;
        struct rnbd_srv_session         *sess;
        struct rnbd_srv_dev             *dev;
        struct kobject                  kobj;
        u32                             device_id;
        bool                            keep_id;
        bool                            readonly;
        struct kref                     kref;
        struct completion               *destroy_comp;
        char                            pathname[NAME_MAX];
        enum rnbd_access_mode           access_mode;
};

void rnbd_srv_sess_dev_force_close(struct rnbd_srv_sess_dev *sess_dev,
                                   struct kobj_attribute *attr);
/* rnbd-srv-sysfs.c */

int rnbd_srv_create_dev_sysfs(struct rnbd_srv_dev *dev,
                              struct block_device *bdev);
void rnbd_srv_destroy_dev_sysfs(struct rnbd_srv_dev *dev);
int rnbd_srv_create_dev_session_sysfs(struct rnbd_srv_sess_dev *sess_dev);
void rnbd_srv_destroy_dev_session_sysfs(struct rnbd_srv_sess_dev *sess_dev);
int rnbd_srv_create_sysfs_files(void);
void rnbd_srv_destroy_sysfs_files(void);
void rnbd_destroy_sess_dev(struct rnbd_srv_sess_dev *sess_dev, bool keep_id);

#endif /* RNBD_SRV_H */