/* * 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, int status); }; 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 */