LXR linux/drivers/usb/mon/usb

   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