FreeBSD/Linux Kernel Cross Reference
sys/geom/multipath/g_multipath.h

     /*-
      * Copyright (c) 2006-2007 Matthew Jacob <mjacob@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: releng/10.0/sys/geom/multipath/g_multipath.h 227464 2011-11-12 09:52:27Z mav $
     */
    /*
     * Based upon work by Pawel Jakub Dawidek <pjd@FreeBSD.org> for all of the
     * fine geom examples, and by Poul Henning Kamp <phk@FreeBSD.org> for GEOM
     * itself, all of which is most gratefully acknowledged.
     */
    
    #ifndef _G_MULTIPATH_H_
    #define _G_MULTIPATH_H_
    
    #define G_MULTIPATH_CLASS_NAME  "MULTIPATH"
    #define G_MULTIPATH_VERSION     1
    #define G_MULTIPATH_MAGIC       "GEOM::MULTIPATH"
    
    #include <sys/endian.h>
    
    #ifdef  _KERNEL
    
    struct g_multipath_softc {
            struct g_provider *     sc_pp;
            struct g_consumer *     sc_active;
            struct mtx              sc_mtx;
            char                    sc_name[16];
            char                    sc_uuid[40];
            int                     sc_opened;
            int                     sc_stopping;
            int                     sc_ndisks;
            int                     sc_active_active; /* Active/Active mode */
    };
    #endif  /* _KERNEL */
    
    struct g_multipath_metadata {
            char            md_magic[16];   /* Magic Value */
            char            md_uuid[40];    /* more magic */
            char            md_name[16];    /* a friendly name */
            uint32_t        md_version;     /* version */
            uint32_t        md_sectorsize;  /* sectorsize of provider */
            uint64_t        md_size;        /* absolute size of provider */
            uint8_t         md_active_active; /* Active/Active mode */
    };
    
    static __inline void
    multipath_metadata_encode(const struct g_multipath_metadata *, u_char *);
    
    static __inline void
    multipath_metadata_decode(u_char *, struct g_multipath_metadata *);
    
    static __inline void
    multipath_metadata_encode(const struct g_multipath_metadata *md, u_char *data)
    {
            bcopy(md->md_magic, data, sizeof(md->md_magic));
            data += sizeof(md->md_magic);
            bcopy(md->md_uuid, data, sizeof(md->md_uuid));
            data += sizeof(md->md_uuid);
            bcopy(md->md_name, data, sizeof(md->md_name));
            data += sizeof(md->md_name);
            le32enc(data, md->md_version);
            data += sizeof(md->md_version);
            le32enc(data, md->md_sectorsize);
            data += sizeof(md->md_sectorsize);
            le64enc(data, md->md_size);
            data += sizeof(md->md_size);
            *data = md->md_active_active;
    }
    
    static __inline void
    multipath_metadata_decode(u_char *data, struct g_multipath_metadata *md)
    {
            bcopy(data, md->md_magic, sizeof(md->md_magic));
            data += sizeof(md->md_magic);
            bcopy(data, md->md_uuid, sizeof(md->md_uuid));
            data += sizeof(md->md_uuid);
            bcopy(data, md->md_name, sizeof(md->md_name));
           data += sizeof(md->md_name);
           md->md_version = le32dec(data);
           data += sizeof(md->md_version);
           md->md_sectorsize = le32dec(data);
           data += sizeof(md->md_sectorsize);
           md->md_size = le64dec(data);
           data += sizeof(md->md_size);
           md->md_active_active = *data;
   }
   #endif  /* _G_MULTIPATH_H_ */

Cache object: 81fbeb2258caf27a11cb9b8770441f61