tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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 struct bio_set sess_bio_set;
27
28 struct xarray index_idr;
29 /* List of struct rnbd_srv_sess_dev */
30 struct list_head sess_dev_list;
31 struct mutex lock;
32 u8 ver;
33};
34
35struct rnbd_srv_dev {
36 /* Entry inside global dev_list */
37 struct list_head list;
38 struct kobject dev_kobj;
39 struct kobject *dev_sessions_kobj;
40 struct kref kref;
41 char id[NAME_MAX];
42 /* List of rnbd_srv_sess_dev structs */
43 struct list_head sess_dev_list;
44 struct mutex lock;
45 int open_write_cnt;
46};
47
48/* Structure which binds N devices and N sessions */
49struct rnbd_srv_sess_dev {
50 /* Entry inside rnbd_srv_dev struct */
51 struct list_head dev_list;
52 /* Entry inside rnbd_srv_session struct */
53 struct list_head sess_list;
54 struct rnbd_dev *rnbd_dev;
55 struct rnbd_srv_session *sess;
56 struct rnbd_srv_dev *dev;
57 struct kobject kobj;
58 u32 device_id;
59 bool keep_id;
60 fmode_t open_flags;
61 struct kref kref;
62 struct completion *destroy_comp;
63 char pathname[NAME_MAX];
64 enum rnbd_access_mode access_mode;
65};
66
67void rnbd_srv_sess_dev_force_close(struct rnbd_srv_sess_dev *sess_dev,
68 struct kobj_attribute *attr);
69/* rnbd-srv-sysfs.c */
70
71int rnbd_srv_create_dev_sysfs(struct rnbd_srv_dev *dev,
72 struct block_device *bdev,
73 const char *dir_name);
74void rnbd_srv_destroy_dev_sysfs(struct rnbd_srv_dev *dev);
75int rnbd_srv_create_dev_session_sysfs(struct rnbd_srv_sess_dev *sess_dev);
76void rnbd_srv_destroy_dev_session_sysfs(struct rnbd_srv_sess_dev *sess_dev);
77int rnbd_srv_create_sysfs_files(void);
78void rnbd_srv_destroy_sysfs_files(void);
79void rnbd_destroy_sess_dev(struct rnbd_srv_sess_dev *sess_dev, bool keep_id);
80
81#endif /* RNBD_SRV_H */