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

source code of linux/drivers/block/rnbd/rnbd-srv.h