FreeBSD/Linux Kernel Cross Reference
sys/geom/shsec/g_shsec.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2005 Pawel Jakub Dawidek <pjd@FreeBSD.org>
      * All rights reserved.
      *
      * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHORS 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 AUTHORS 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.
     *
     * $FreeBSD$
     */
    
    #ifndef _G_SHSEC_H_
    #define _G_SHSEC_H_
    
    #include <sys/endian.h>
    
    #define G_SHSEC_CLASS_NAME      "SHSEC"
    
    #define G_SHSEC_MAGIC           "GEOM::SHSEC"
    /*
     * Version history:
     * 0 - Initial version number.
     * 1 - Added md_provsize field to metadata.
     */
    #define G_SHSEC_VERSION 1
    
    #ifdef _KERNEL
    #define G_SHSEC_BFLAG_FIRST     0x1
    
    #define G_SHSEC_DEBUG(lvl, ...) \
        _GEOM_DEBUG("GEOM_SHSEC", g_shsec_debug, (lvl), NULL, __VA_ARGS__)
    #define G_SHSEC_LOGREQ(lvl, bp, ...) \
        _GEOM_DEBUG("GEOM_SHSEC", g_shsec_debug, (lvl), (bp), __VA_ARGS__)
    
    struct g_shsec_softc {
            u_int            sc_type;       /* provider type */
            struct g_geom   *sc_geom;
            struct g_provider *sc_provider;
            uint32_t         sc_id;         /* device unique ID */
            struct g_consumer **sc_disks;
            uint16_t         sc_ndisks;
    };
    #define sc_name sc_geom->name
    #endif  /* _KERNEL */
    
    struct g_shsec_metadata {
            char            md_magic[16];   /* Magic value. */
            uint32_t        md_version;     /* Version number. */
            char            md_name[16];    /* Stripe name. */
            uint32_t        md_id;          /* Unique ID. */
            uint16_t        md_no;          /* Disk number. */
            uint16_t        md_all;         /* Number of all disks. */
            char            md_provider[16]; /* Hardcoded provider. */
            uint64_t        md_provsize;    /* Provider's size. */
    };
    static __inline void
    shsec_metadata_encode(const struct g_shsec_metadata *md, u_char *data)
    {
    
            bcopy(md->md_magic, data, sizeof(md->md_magic));
            le32enc(data + 16, md->md_version);
            bcopy(md->md_name, data + 20, sizeof(md->md_name));
            le32enc(data + 36, md->md_id);
            le16enc(data + 40, md->md_no);
            le16enc(data + 42, md->md_all);
            bcopy(md->md_provider, data + 44, sizeof(md->md_provider));
            le64enc(data + 60, md->md_provsize);
    }
    static __inline void
    shsec_metadata_decode(const u_char *data, struct g_shsec_metadata *md)
    {
    
            bcopy(data, md->md_magic, sizeof(md->md_magic));
            md->md_version = le32dec(data + 16);
            bcopy(data + 20, md->md_name, sizeof(md->md_name));
            md->md_id = le32dec(data + 36);
            md->md_no = le16dec(data + 40);
            md->md_all = le16dec(data + 42);
            bcopy(data + 44, md->md_provider, sizeof(md->md_provider));
            md->md_provsize = le64dec(data + 60);
   }
   #endif  /* _G_SHSEC_H_ */

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