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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 dentry *dent_s; /* Debugging file */
21 struct dentry *dent_t; /* Text interface file */
22 struct usb_bus *u_bus;
23 int uses_dma;
24
25 /* Ref */
26 int nreaders; /* Under mon_lock AND mbus->lock */
27 struct list_head r_list; /* Chain of readers (usually one) */
28 struct kref ref; /* Under mon_lock */
29
30 /* Stats */
31 unsigned int cnt_events;
32 unsigned int cnt_text_lost;
33};
34
35/*
36 * An instance of a process which opened a file (but can fork later)
37 */
38struct mon_reader {
39 struct list_head r_link;
40 struct mon_bus *m_bus;
41 void *r_data; /* Use container_of instead? */
42
43 void (*rnf_submit)(void *data, struct urb *urb);
44 void (*rnf_error)(void *data, struct urb *urb, int error);
45 void (*rnf_complete)(void *data, struct urb *urb);
46};
47
48void mon_reader_add(struct mon_bus *mbus, struct mon_reader *r);
49void mon_reader_del(struct mon_bus *mbus, struct mon_reader *r);
50
51/*
52 */
53extern char mon_dmapeek(unsigned char *dst, dma_addr_t dma_addr, int len);
54
55extern struct mutex mon_lock;
56
57extern const struct file_operations mon_fops_text;
58extern const struct file_operations mon_fops_stat;
59
60#endif /* __USB_MON_H */