sys/sys/mapped_ioctl.h

   1 /*
   2  * Copyright (c) 2004, 2005 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Simon 'corecode' Schubert <corecode@fs.ei.tum.de>.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $DragonFly: src/sys/sys/mapped_ioctl.h,v 1.4 2006/05/20 02:42:13 dillon Exp $
  35  */
  36 #ifndef _SYS_MAPPED_IOCTL_H_
  37 #define _SYS_MAPPED_IOCTL_H_
  38
  39 #ifndef _SYS_TYPES_H_
  40 #include <sys/types.h>
  41 #endif
  42 #ifndef _SYS_QUEUE_H_
  43 #include <sys/queue.h>
  44 #endif
  45
  46 struct file;
  47 struct thread;
  48 struct ucred;
  49 struct ioctl_map_entry;
  50
  51 typedef int     (ioctl_wrap_func)(struct file *, u_long, u_long, caddr_t,
  52                                   struct ucred *);
  53 typedef u_long  (ioctl_map_func)(u_long, u_long, u_long, u_long, u_long, u_long);
  54
  55 struct ioctl_map_range {
  56         u_long          start;          /* Start of source range; inclusive */
  57         u_long          end;            /* End of source range; inclusive */
  58         u_long          maptocmd;       /* Start of destination range */
  59         u_long          maptoend;       /* End of destination range */
  60         ioctl_wrap_func *wrapfunc;      /* Ioctl handler to use */
  61         ioctl_map_func  *mapfunc;       /* Handler to map source to dest */
  62 };
  63
  64 #define MAPPED_IOCTL_MAPRANGE(c,e,t,r,f,m)      { (c), (e), (t), (r), (f), (m) }
  65 #define MAPPED_IOCTL_MAPF(c,t,f)                MAPPED_IOCTL_MAPRANGE((c), (c), (t), (t), (f), NULL)
  66 #define MAPPED_IOCTL_MAP(c,t)                   MAPPED_IOCTL_MAPF((c), (t), NULL)
  67 #define MAPPED_IOCTL_IO(c,f)                    MAPPED_IOCTL_MAPF((c), _IO(0, 0), (f))
  68 #define MAPPED_IOCTL_IOR(c,f,t)                 MAPPED_IOCTL_MAPF((c), _IOR(0, 0, t), (f))
  69 #define MAPPED_IOCTL_IOW(c,f,t)                 MAPPED_IOCTL_MAPF((c), _IOW(0, 0, t), (f))
  70 #define MAPPED_IOCTL_IOWR(c,f,t)                MAPPED_IOCTL_MAPF((c), _IOWR(0, 0, t), (f))
  71
  72 struct ioctl_map {
  73         u_long mask;
  74         const char *sys;
  75         LIST_HEAD(, ioctl_map_entry) mapping;
  76 };
  77
  78 struct ioctl_map_handler {
  79         struct ioctl_map        *map;
  80         const char              *subsys;
  81         struct ioctl_map_range  *cmd_ranges;
  82 };
  83
  84 int mapped_ioctl(int fd, u_long com, caddr_t uspc_data, struct ioctl_map *map);
  85 int mapped_ioctl_register_handler(struct ioctl_map_handler *he);
  86 int mapped_ioctl_unregister_handler(struct ioctl_map_handler *he);
  87
  88 #endif /* !_SYS_MAPPED_IOCTL_H_ */