kernel-ark/drivers/usb/mon/usb_mon.h
Pete Zaitcev 0256839619 [PATCH] usbmon in 2.6.13: peeking into DMA areas
This code looks at urb->transfer_dma, maps the page and takes the data.
I am looking for volunteers to contribute architectures other than i386
or to develop an architecure-neutral API for it (or point me that it
was done already).

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-09-08 16:28:36 -07:00

58 lines
1.4 KiB
C

/*
* 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 dentry *dent_s; /* Debugging file */
struct dentry *dent_t; /* Text interface file */
struct usb_bus *u_bus;
/* 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_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_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);
/*
*/
extern char mon_dmapeek(unsigned char *dst, dma_addr_t dma_addr, int len);
extern struct semaphore mon_lock;
extern struct file_operations mon_fops_text;
extern struct file_operations mon_fops_stat;
#endif /* __USB_MON_H */