drivers/usb/mon/usb_mon.h

   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
  17 struct 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
  24         /* Ref */
  25         int nreaders;                   /* Under mon_lock AND mbus->lock */
  26         struct list_head r_list;        /* Chain of readers (usually one) */
  27         struct kref ref;                /* Under mon_lock */
  28
  29         /* Stats */
  30         unsigned int cnt_text_lost;
  31 };
  32
  33 /*
  34  * An instance of a process which opened a file (but can fork later)
  35  */
  36 struct mon_reader {
  37         struct list_head r_link;
  38         struct mon_bus *m_bus;
  39         void *r_data;           /* Use container_of instead? */
  40
  41         void (*rnf_submit)(void *data, struct urb *urb);
  42         void (*rnf_complete)(void *data, struct urb *urb);
  43 };
  44
  45 void mon_reader_add(struct mon_bus *mbus, struct mon_reader *r);
  46 void mon_reader_del(struct mon_bus *mbus, struct mon_reader *r);
  47
  48 extern struct semaphore mon_lock;
  49
  50 extern struct file_operations mon_fops_text;
  51 extern struct file_operations mon_fops_stat;
  52
  53 #endif /* __USB_MON_H */