| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * 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); |
| |
| /* |
| */ |
| 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 */ |