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 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 */ 42 struct 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 52 void mon_reader_add(struct mon_bus *mbus, struct mon_reader *r); 53 void mon_reader_del(struct mon_bus *mbus, struct mon_reader *r); 54 55 struct mon_bus *mon_bus_lookup(unsigned int num); 56 57 int /*bool*/ mon_text_add(struct mon_bus *mbus, const struct usb_bus *ubus); 58 void mon_text_del(struct mon_bus *mbus); 59 int /*bool*/ mon_bin_add(struct mon_bus *mbus, const struct usb_bus *ubus); 60 void mon_bin_del(struct mon_bus *mbus); 61 62 int __init mon_text_init(void); 63 void mon_text_exit(void); 64 int __init mon_bin_init(void); 65 void mon_bin_exit(void); 66 67 /* 68 */ 69 extern struct mutex mon_lock; 70 71 extern const struct file_operations mon_fops_stat; 72 73 extern struct mon_bus mon_bus0; /* Only for redundant checks */ 74 75 #endif /* __USB_MON_H */ 76