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/*
* The USB Monitor, inspired by Dave Harding's USBMon.
*
* Copyright (C) 2005 Pete Zaitcev (zaitcev@redhat.com)
*/
#ifndef __USB_MON_H
#define __USB_MON_H
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/kref.h>
/* #include <linux/usb.h> */ /* We use struct pointers only in this header */
#define TAG "usbmon"
struct mon_bus {
struct list_head bus_link;
spinlock_t lock;
struct usb_bus *u_bus;
int text_inited;
int bin_inited;
struct dentry *dent_s; /* Debugging file */
struct dentry *dent_t; /* Text interface file */
struct dentry *dent_u; /* Second text interface file */
struct device *classdev; /* Device in usbmon class */
/* Ref */
int nreaders; /* Under mon_lock AND mbus->lock */
struct list_head r_list; /* Chain of readers (usually one) */
struct kref ref; /* Under mon_lock */
/* Stats */
unsigned int cnt_events;
unsigned int cnt_text_lost;
};
/*
* An instance of a process which opened a file (but can fork later)
*/
struct mon_reader {
struct list_head r_link;
struct mon_bus *m_bus;
void *r_data; /* Use container_of instead? */
void (*rnf_submit)(void *data, struct urb *urb);
void (*rnf_error)(void *data, struct urb *urb, int error);
void (*rnf_complete)(void *data, struct urb *urb);
};
void mon_reader_add(struct mon_bus *mbus, struct mon_reader *r);
void mon_reader_del(struct mon_bus *mbus, struct mon_reader *r);
struct mon_bus *mon_bus_lookup(unsigned int num);
int /*bool*/ mon_text_add(struct mon_bus *mbus, const struct usb_bus *ubus);
void mon_text_del(struct mon_bus *mbus);
int /*bool*/ mon_bin_add(struct mon_bus *mbus, const struct usb_bus *ubus);
void mon_bin_del(struct mon_bus *mbus);
int __init mon_text_init(void);
void mon_text_exit(void);
int __init mon_bin_init(void);
void mon_bin_exit(void);
/*
* DMA interface.
*
* XXX The vectored side needs a serious re-thinking. Abstracting vectors,
* like in Paolo's original patch, produces a double pkmap. We need an idea.
*/
extern char mon_dmapeek(unsigned char *dst, dma_addr_t dma_addr, int len);
struct mon_reader_bin;
extern void mon_dmapeek_vec(const struct mon_reader_bin *rp,
unsigned int offset, dma_addr_t dma_addr, unsigned int len);
extern unsigned int mon_copy_to_buff(const struct mon_reader_bin *rp,
unsigned int offset, const unsigned char *from, unsigned int len);
/*
*/
extern struct mutex mon_lock;
extern const struct file_operations mon_fops_stat;
extern struct mon_bus mon_bus0; /* Only for redundant checks */
#endif /* __USB_MON_H */
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