1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * RDMA Network Block Driver
4 *
5 * Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved.
6 * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved.
7 * Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved.
8 */
9#ifndef RNBD_SRV_H
10#define RNBD_SRV_H
11
12#include <linux/types.h>
13#include <linux/idr.h>
14#include <linux/kref.h>
15
16#include <rtrs.h>
17#include "rnbd-proto.h"
18#include "rnbd-log.h"
19
20struct rnbd_srv_session {
21	/* Entry inside global sess_list */
22	struct list_head        list;
23	struct rtrs_srv_sess	*rtrs;
24	char			sessname[NAME_MAX];
25	int			queue_depth;
26
27	struct xarray		index_idr;
28	struct mutex		lock;
29	u8			ver;
30};
31
32struct rnbd_srv_dev {
33	/* Entry inside global dev_list */
34	struct list_head                list;
35	struct kobject                  dev_kobj;
36	struct kobject                  *dev_sessions_kobj;
37	struct kref                     kref;
38	char				name[NAME_MAX];
39	/* List of rnbd_srv_sess_dev structs */
40	struct list_head		sess_dev_list;
41	struct mutex			lock;
42	int				open_write_cnt;
43};
44
45/* Structure which binds N devices and N sessions */
46struct rnbd_srv_sess_dev {
47	/* Entry inside rnbd_srv_dev struct */
48	struct list_head		dev_list;
49	struct file			*bdev_file;
50	struct rnbd_srv_session		*sess;
51	struct rnbd_srv_dev		*dev;
52	struct kobject                  kobj;
53	u32                             device_id;
54	bool				keep_id;
55	bool				readonly;
56	struct kref			kref;
57	struct completion               *destroy_comp;
58	char				pathname[NAME_MAX];
59	enum rnbd_access_mode		access_mode;
60};
61
62void rnbd_srv_sess_dev_force_close(struct rnbd_srv_sess_dev *sess_dev,
63				   struct kobj_attribute *attr);
64/* rnbd-srv-sysfs.c */
65
66int rnbd_srv_create_dev_sysfs(struct rnbd_srv_dev *dev,
67			      struct block_device *bdev);
68void rnbd_srv_destroy_dev_sysfs(struct rnbd_srv_dev *dev);
69int rnbd_srv_create_dev_session_sysfs(struct rnbd_srv_sess_dev *sess_dev);
70void rnbd_srv_destroy_dev_session_sysfs(struct rnbd_srv_sess_dev *sess_dev);
71int rnbd_srv_create_sysfs_files(void);
72void rnbd_srv_destroy_sysfs_files(void);
73void rnbd_destroy_sess_dev(struct rnbd_srv_sess_dev *sess_dev, bool keep_id);
74
75#endif /* RNBD_SRV_H */
76