sys/dev/cgdvar.h

   1 /* $NetBSD: cgdvar.h,v 1.12 2008/09/12 16:51:55 christos Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Roland C. Dowdeswell.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #ifndef _DEV_CGDVAR_H_
  33 #define _DEV_CGDVAR_H_
  34
  35 #include <sys/simplelock.h>
  36
  37 /* ioctl(2) code */
  38 struct cgd_ioctl {
  39         const char      *ci_disk;
  40         int              ci_flags;
  41         int              ci_unit;
  42         size_t           ci_size;
  43         const char      *ci_alg;
  44         const char      *ci_ivmethod;
  45         size_t           ci_keylen;
  46         const char      *ci_key;
  47         size_t           ci_blocksize;
  48 };
  49
  50 #ifdef _KERNEL
  51
  52 #include <dev/cgd_crypto.h>
  53
  54 /* This cryptdata structure is here rather than cgd_crypto.h, since
  55  * it stores local state which will not be generalised beyond the
  56  * cgd driver.
  57  */
  58
  59 struct cryptdata {
  60         size_t           cf_blocksize;  /* block size (in bytes) */
  61         int              cf_mode;       /* Cipher Mode and IV Gen method */
  62 #define CGD_CIPHER_CBC_ENCBLKNO8 1      /* CBC Mode w/ Enc Block Number
  63                                          * 8 passes (compat only)
  64                                          */
  65 #define CGD_CIPHER_CBC_ENCBLKNO1 2      /* CBC Mode w/ Enc Block Number
  66                                          * 1 pass (default)
  67                                          */
  68         void            *cf_priv;       /* enc alg private data */
  69 };
  70
  71 struct cgd_softc {
  72         struct dk_softc          sc_dksc;       /* generic disk interface */
  73         struct cryptinfo        *sc_crypt;      /* the alg/key/etc */
  74         struct vnode            *sc_tvn;        /* target device's vnode */
  75         dev_t                    sc_tdev;       /* target device */
  76         char                    *sc_tpath;      /* target device's path */
  77         void *                   sc_data;       /* emergency buffer */
  78         int                      sc_data_used;  /* Really lame, we'll change */
  79         size_t                   sc_tpathlen;   /* length of prior string */
  80         struct cryptdata         sc_cdata;      /* crypto data */
  81         struct cryptfuncs       *sc_cfuncs;     /* encryption functions */
  82         struct simplelock        sc_slock;      /* our lock */
  83 };
  84 #endif
  85
  86 /* XXX XAX XXX elric:  check these out properly. */
  87 #define CGDIOCSET       _IOWR('F', 18, struct cgd_ioctl)
  88 #define CGDIOCCLR       _IOW('F', 19, struct cgd_ioctl)
  89
  90 /* Maximum block sized to be used by the ciphers */
  91 #define CGD_MAXBLOCKSIZE        128
  92
  93 #endif /* _DEV_CGDVAR_H_ */