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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/drivers/block/rnbd/rnbd-srv.h
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/* SPDX-License-Identifier: GPL-2.0-or-later */

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/*

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 * RDMA Network Block Driver

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 *

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 * Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved.

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 * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved.

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 * Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved.

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 */

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#ifndef RNBD_SRV_H

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#define RNBD_SRV_H

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#include <linux/types.h>

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#include <linux/idr.h>

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#include <linux/kref.h>

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#include <rtrs.h>

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#include "rnbd-proto.h"

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#include "rnbd-log.h"

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struct rnbd_srv_session {

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	/* Entry inside global sess_list */

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	struct list_head        list;

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	struct rtrs_srv_sess	*rtrs;

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	char			sessname[NAME_MAX];

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	int			queue_depth;

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	struct xarray		index_idr;

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	struct mutex		lock;

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	u8			ver;

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};

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struct rnbd_srv_dev {

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	/* Entry inside global dev_list */

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	struct list_head                list;

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	struct kobject                  dev_kobj;

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	struct kobject                  *dev_sessions_kobj;

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	struct kref                     kref;

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	char				name[NAME_MAX];

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	/* List of rnbd_srv_sess_dev structs */

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	struct list_head		sess_dev_list;

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	struct mutex			lock;

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	int				open_write_cnt;

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};

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/* Structure which binds N devices and N sessions */

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struct rnbd_srv_sess_dev {

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	/* Entry inside rnbd_srv_dev struct */

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	struct list_head		dev_list;

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	struct file			*bdev_file;

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	struct rnbd_srv_session		*sess;

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	struct rnbd_srv_dev		*dev;

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	struct kobject                  kobj;

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	u32                             device_id;

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	bool				keep_id;

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	bool				readonly;

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	struct kref			kref;

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	struct completion               *destroy_comp;

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	char				pathname[NAME_MAX];

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	enum rnbd_access_mode		access_mode;

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};

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void rnbd_srv_sess_dev_force_close(struct rnbd_srv_sess_dev *sess_dev,

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				   struct kobj_attribute *attr);

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/* rnbd-srv-sysfs.c */

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int rnbd_srv_create_dev_sysfs(struct rnbd_srv_dev *dev,

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			      struct block_device *bdev);

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void rnbd_srv_destroy_dev_sysfs(struct rnbd_srv_dev *dev);

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int rnbd_srv_create_dev_session_sysfs(struct rnbd_srv_sess_dev *sess_dev);

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void rnbd_srv_destroy_dev_session_sysfs(struct rnbd_srv_sess_dev *sess_dev);

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int rnbd_srv_create_sysfs_files(void);

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void rnbd_srv_destroy_sysfs_files(void);

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void rnbd_destroy_sess_dev(struct rnbd_srv_sess_dev *sess_dev, bool keep_id);

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#endif /* RNBD_SRV_H */

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