1 /* 2 * The USB Monitor, inspired by Dave Harding's USBMon. 3 * 4 * Copyright (C) 2005 Pete Zaitcev (zaitcev@redhat.com) 5 */ 6 7 #ifndef __USB_MON_H 8 #define __USB_MON_H 9 10 #include <linux/list.h> 11 #include <linux/slab.h> 12 #include <linux/kref.h> 13 /* #include <linux/usb.h> */ /* We use struct pointers only in this header */ 14 15 #define TAG "usbmon" 16 17 struct mon_bus { 18 struct list_head bus_link; 19 spinlock_t lock; 20 struct usb_bus *u_bus; 21 22 int text_inited; 23 struct dentry *dent_s; /* Debugging file */ 24 struct dentry *dent_t; /* Text interface file */ 25 int uses_dma; 26 27 /* Ref */ 28 int nreaders; /* Under mon_lock AND mbus->lock */ 29 struct list_head r_list; /* Chain of readers (usually one) */ 30 struct kref ref; /* Under mon_lock */ 31 32 /* Stats */ 33 unsigned int cnt_events; 34 unsigned int cnt_text_lost; 35 }; 36 37 /* 38 * An instance of a process which opened a file (but can fork later) 39 */ 40 struct mon_reader { 41 struct list_head r_link; 42 struct mon_bus *m_bus; 43 void *r_data; /* Use container_of instead? */ 44 45 void (*rnf_submit)(void *data, struct urb *urb); 46 void (*rnf_error)(void *data, struct urb *urb, int error); 47 void (*rnf_complete)(void *data, struct urb *urb); 48 }; 49 50 void mon_reader_add(struct mon_bus *mbus, struct mon_reader *r); 51 void mon_reader_del(struct mon_bus *mbus, struct mon_reader *r); 52 53 struct mon_bus *mon_bus_lookup(unsigned int num); 54 55 int /*bool*/ mon_text_add(struct mon_bus *mbus, const struct usb_bus *ubus); 56 void mon_text_del(struct mon_bus *mbus); 57 // void mon_bin_add(struct mon_bus *); 58 59 int __init mon_text_init(void); 60 void mon_text_exit(void); 61 int __init mon_bin_init(void); 62 void mon_bin_exit(void); 63 64 /* 65 * DMA interface. 66 * 67 * XXX The vectored side needs a serious re-thinking. Abstracting vectors, 68 * like in Paolo's original patch, produces a double pkmap. We need an idea. 69 */ 70 extern char mon_dmapeek(unsigned char *dst, dma_addr_t dma_addr, int len); 71 72 struct mon_reader_bin; 73 extern void mon_dmapeek_vec(const struct mon_reader_bin *rp, 74 unsigned int offset, dma_addr_t dma_addr, unsigned int len); 75 extern unsigned int mon_copy_to_buff(const struct mon_reader_bin *rp, 76 unsigned int offset, const unsigned char *from, unsigned int len); 77 78 /* 79 */ 80 extern struct mutex mon_lock; 81 82 extern const struct file_operations mon_fops_stat; 83 84 #endif /* __USB_MON_H */ 85