| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* |
| 3 | * The USB Monitor, inspired by Dave Harding's USBMon. |
| 4 | * |
| 5 | * Copyright (C) 2005 Pete Zaitcev (zaitcev@redhat.com) |
| 6 | */ |
| 7 | |
| 8 | #ifndef __USB_MON_H |
| 9 | #define __USB_MON_H |
| 10 | |
| 11 | #include <linux/list.h> |
| 12 | #include <linux/slab.h> |
| 13 | #include <linux/kref.h> |
| 14 | /* #include <linux/usb.h> */ /* We use struct pointers only in this header */ |
| 15 | |
| 16 | #define TAG "usbmon" |
| 17 | |
| 18 | struct mon_bus { |
| 19 | struct list_head bus_link; |
| 20 | spinlock_t lock; |
| 21 | struct usb_bus *u_bus; |
| 22 | |
| 23 | int text_inited; |
| 24 | int bin_inited; |
| 25 | struct dentry *dent_s; /* Debugging file */ |
| 26 | struct dentry *dent_t; /* Text interface file */ |
| 27 | struct dentry *dent_u; /* Second text interface file */ |
| 28 | struct device *classdev; /* Device in usbmon class */ |
| 29 | |
| 30 | /* Ref */ |
| 31 | int nreaders; /* Under mon_lock AND mbus->lock */ |
| 32 | struct list_head r_list; /* Chain of readers (usually one) */ |
| 33 | struct kref ref; /* Under mon_lock */ |
| 34 | |
| 35 | /* Stats */ |
| 36 | unsigned int cnt_events; |
| 37 | unsigned int cnt_text_lost; |
| 38 | }; |
| 39 | |
| 40 | /* |
| 41 | * An instance of a process which opened a file (but can fork later) |
| 42 | */ |
| 43 | struct mon_reader { |
| 44 | struct list_head r_link; |
| 45 | struct mon_bus *m_bus; |
| 46 | void *r_data; /* Use container_of instead? */ |
| 47 | |
| 48 | void (*rnf_submit)(void *data, struct urb *urb); |
| 49 | void (*rnf_error)(void *data, struct urb *urb, int error); |
| 50 | void (*rnf_complete)(void *data, struct urb *urb, int status); |
| 51 | }; |
| 52 | |
| 53 | void mon_reader_add(struct mon_bus *mbus, struct mon_reader *r); |
| 54 | void mon_reader_del(struct mon_bus *mbus, struct mon_reader *r); |
| 55 | |
| 56 | struct mon_bus *mon_bus_lookup(unsigned int num); |
| 57 | |
| 58 | int /*bool*/ mon_text_add(struct mon_bus *mbus, const struct usb_bus *ubus); |
| 59 | void mon_text_del(struct mon_bus *mbus); |
| 60 | int /*bool*/ mon_bin_add(struct mon_bus *mbus, const struct usb_bus *ubus); |
| 61 | void mon_bin_del(struct mon_bus *mbus); |
| 62 | |
| 63 | int __init mon_text_init(void); |
| 64 | void mon_text_exit(void); |
| 65 | int __init mon_bin_init(void); |
| 66 | void mon_bin_exit(void); |
| 67 | |
| 68 | /* |
| 69 | */ |
| 70 | extern struct mutex mon_lock; |
| 71 | |
| 72 | extern const struct file_operations mon_fops_stat; |
| 73 | |
| 74 | extern struct mon_bus mon_bus0; /* Only for redundant checks */ |
| 75 | |
| 76 | #endif /* __USB_MON_H */ |