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