drivers/usb/mon/usb_mon.h

   1 /*
   2  * The USB Monitor, inspired by Dave Harding's USBMon.
   3  */
   4
   5 #ifndef __USB_MON_H
   6 #define __USB_MON_H
   7
   8 #include <linux/list.h>
   9 #include <linux/slab.h>
  10 #include <linux/kref.h>
  11 /* #include <linux/usb.h> */    /* We use struct pointers only in this header */
  12
  13 #define TAG "usbmon"
  14
  15 struct mon_bus {
  16         struct list_head bus_link;
  17         spinlock_t lock;
  18         struct dentry *dent_s;          /* Debugging file */
  19         struct dentry *dent_t;          /* Text interface file */
  20         struct usb_bus *u_bus;
  21
  22         /* Ref */
  23         int nreaders;                   /* Under mon_lock AND mbus->lock */
  24         struct list_head r_list;        /* Chain of readers (usually one) */
  25         struct kref ref;                /* Under mon_lock */
  26
  27         /* Stats */
  28         unsigned int cnt_text_lost;
  29 };
  30
  31 /*
  32  * An instance of a process which opened a file (but can fork later)
  33  */
  34 struct mon_reader {
  35         struct list_head r_link;
  36         struct mon_bus *m_bus;
  37         void *r_data;           /* Use container_of instead? */
  38
  39         void (*rnf_submit)(void *data, struct urb *urb);
  40         void (*rnf_complete)(void *data, struct urb *urb);
  41 };
  42
  43 void mon_reader_add(struct mon_bus *mbus, struct mon_reader *r);
  44 void mon_reader_del(struct mon_bus *mbus, struct mon_reader *r);
  45
  46 extern struct semaphore mon_lock;
  47
  48 extern struct file_operations mon_fops_text;
  49 extern struct file_operations mon_fops_stat;
  50
  51 #endif /* __USB_MON_H */