1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * The USB Monitor, inspired by Dave Harding's USBMon.
4 *
5 * Copyright (C) 2005 Pete Zaitcev (zaitcev@redhat.com)
6 */
7
8#ifndef __USB_MON_H
9#define __USB_MON_H
10
11#include <linux/list.h>
12#include <linux/slab.h>
13#include <linux/kref.h>
14/* #include <linux/usb.h> */ /* We use struct pointers only in this header */
15
16#define TAG "usbmon"
17
18struct mon_bus {
19 struct list_head bus_link;
20 spinlock_t lock;
21 struct usb_bus *u_bus;
22
23 int text_inited;
24 int bin_inited;
25 struct dentry *dent_s; /* Debugging file */
26 struct dentry *dent_t; /* Text interface file */
27 struct dentry *dent_u; /* Second text interface file */
28 struct device *classdev; /* Device in usbmon class */
29
30 /* Ref */
31 int nreaders; /* Under mon_lock AND mbus->lock */
32 struct list_head r_list; /* Chain of readers (usually one) */
33 struct kref ref; /* Under mon_lock */
34
35 /* Stats */
36 unsigned int cnt_events;
37 unsigned int cnt_text_lost;
38};
39
40/*
41 * An instance of a process which opened a file (but can fork later)
42 */
43struct mon_reader {
44 struct list_head r_link;
45 struct mon_bus *m_bus;
46 void *r_data; /* Use container_of instead? */
47
48 void (*rnf_submit)(void *data, struct urb *urb);
49 void (*rnf_error)(void *data, struct urb *urb, int error);
50 void (*rnf_complete)(void *data, struct urb *urb, int status);
51};
52
53void mon_reader_add(struct mon_bus *mbus, struct mon_reader *r);
54void mon_reader_del(struct mon_bus *mbus, struct mon_reader *r);
55
56struct mon_bus *mon_bus_lookup(unsigned int num);
57
58int /*bool*/ mon_text_add(struct mon_bus *mbus, const struct usb_bus *ubus);
59void mon_text_del(struct mon_bus *mbus);
60int /*bool*/ mon_bin_add(struct mon_bus *mbus, const struct usb_bus *ubus);
61void mon_bin_del(struct mon_bus *mbus);
62
63int __init mon_text_init(void);
64void mon_text_exit(void);
65int __init mon_bin_init(void);
66void mon_bin_exit(void);
67
68/*
69 */
70extern struct mutex mon_lock;
71
72extern const struct file_operations mon_fops_stat;
73
74extern struct mon_bus mon_bus0; /* Only for redundant checks */
75
76#endif /* __USB_MON_H */
77