The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/cgdvar.h

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    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 #endif /* _DEV_CGDVAR_H_ */

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