ioctls/usbmon.c

   1 #include <linux/ioctl.h>
   2 #include <linux/types.h>
   3
   4 #include "ioctls.h"
   5 #include "utils.h"
   6
   7 /* drivers/usb/mon/mon_bin.c */
   8 /*
   9  * The USB Monitor, inspired by Dave Harding's USBMon.
  10  *
  11  * This is a binary format reader.
  12  *
  13  * Copyright (C) 2006 Paolo Abeni (paolo.abeni@email.it)
  14  * Copyright (C) 2006,2007 Pete Zaitcev (zaitcev@redhat.com)
  15  */
  16
  17 /* ioctl macros */
  18 #define MON_IOC_MAGIC 0x92
  19
  20 #define MON_IOCQ_URB_LEN _IO(MON_IOC_MAGIC, 1)
  21 /* #2 used to be MON_IOCX_URB, removed before it got into Linus tree */
  22 #define MON_IOCG_STATS _IOR(MON_IOC_MAGIC, 3, struct mon_bin_stats)
  23 #define MON_IOCT_RING_SIZE _IO(MON_IOC_MAGIC, 4)
  24 #define MON_IOCQ_RING_SIZE _IO(MON_IOC_MAGIC, 5)
  25 #define MON_IOCX_GET   _IOW(MON_IOC_MAGIC, 6, struct mon_bin_get)
  26 #define MON_IOCX_MFETCH _IOWR(MON_IOC_MAGIC, 7, struct mon_bin_mfetch)
  27 #define MON_IOCH_MFLUSH _IO(MON_IOC_MAGIC, 8)
  28 /* #9 was MON_IOCT_SETAPI */
  29 #define MON_IOCX_GETX   _IOW(MON_IOC_MAGIC, 10, struct mon_bin_get)
  30
  31 struct mon_bin_stats {
  32         __u32 queued;
  33         __u32 dropped;
  34 };
  35
  36 struct mon_bin_get {
  37         /*struct mon_bin_hdr __user *hdr;*/     /* Can be 48 bytes or 64. */
  38         void *hdr;
  39         void /*__user*/ *data;
  40         size_t alloc;           /* Length of data (can be zero) */
  41 };
  42
  43 struct mon_bin_mfetch {
  44         __u32 /*__user*/ *offvec;       /* Vector of events fetched */
  45         __u32 nfetch;           /* Number of events to fetch (out: fetched) */
  46         __u32 nflush;           /* Number of events to flush */
  47 };
  48
  49 static const struct ioctl usbmon_ioctls[] = {
  50         IOCTL(MON_IOCQ_URB_LEN),
  51         IOCTL(MON_IOCG_STATS),
  52         IOCTL(MON_IOCT_RING_SIZE),
  53         IOCTL(MON_IOCQ_RING_SIZE),
  54         IOCTL(MON_IOCX_GET),
  55         IOCTL(MON_IOCX_MFETCH),
  56         IOCTL(MON_IOCH_MFLUSH),
  57         IOCTL(MON_IOCX_GETX),
  58 };
  59
  60 static const char *const usbmon_devs[] = {
  61         "usbmon",
  62 };
  63
  64 static const struct ioctl_group usbmon_grp = {
  65         .devtype = DEV_CHAR,
  66         .devs = usbmon_devs,
  67         .devs_cnt = ARRAY_SIZE(usbmon_devs),
  68         .sanitise = pick_random_ioctl,
  69         .ioctls = usbmon_ioctls,
  70         .ioctls_cnt = ARRAY_SIZE(usbmon_ioctls),
  71 };
  72
  73 REG_IOCTL_GROUP(usbmon_grp)