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

     /* $NetBSD: cgdvar.h,v 1.2 2004/03/27 23:23:06 elric Exp $ */
     
     /*-
      * Copyright (c) 2002 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Roland C. Dowdeswell.
      *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *        This product includes software developed by the NetBSD
     *        Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     */
    
    /* ioctl(2) code */
    struct cgd_ioctl {
            char    *ci_disk;
            int      ci_flags;
            int      ci_unit;
            size_t   ci_size;
            char    *ci_alg;
            char    *ci_ivmethod;
            size_t   ci_keylen;
            char    *ci_key;
            size_t   ci_blocksize;
    };
    
    #ifdef _KERNEL
    
    #include <dev/cgd_crypto.h>
    
    /* This cryptdata structure is here rather than cgd_crypto.h, since
     * it stores local state which will not be generalised beyond the
     * cgd driver.
     */
    
    struct cryptdata {
            int              cf_blocksize;  /* block size (in bytes) */
            int              cf_mode;       /* Cipher Mode and IV Gen method */
    #define CGD_CIPHER_CBC_ENCBLKNO 1       /* CBC Mode w/ Enc Block Number */
            void            *cf_priv;       /* enc alg private data */
    };
    
    struct cgd_softc {
            struct dk_softc          sc_dksc;       /* generic disk interface */
            struct cryptinfo        *sc_crypt;      /* the alg/key/etc */
            struct vnode            *sc_tvn;        /* target device's vnode */
            dev_t                    sc_tdev;       /* target device */
            char                    *sc_tpath;      /* target device's path */
            caddr_t                  sc_data;       /* emergency buffer */
            int                      sc_data_used;  /* Really lame, we'll change */
            size_t                   sc_tpathlen;   /* length of prior string */
            struct cryptdata         sc_cdata;      /* crypto data */
            struct cryptfuncs       *sc_cfuncs;     /* encryption functions */
            struct simplelock        sc_slock;      /* our lock */
    };
    #endif
    
    /* XXX XAX XXX elric:  check these out properly. */
    #define CGDIOCSET       _IOWR('F', 18, struct cgd_ioctl)
    #define CGDIOCCLR       _IOW('F', 19, struct cgd_ioctl)

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