FreeBSD/Linux Kernel Cross Reference
sys/geom/virstor/g_virstor.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2006-2007 Ivan Voras <ivoras@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_VIRSTOR_H_
    #define _G_VIRSTOR_H_
    
    #define G_VIRSTOR_CLASS_NAME "VIRSTOR"
    
    #define VIRSTOR_MAP_ALLOCATED 1
    struct virstor_map_entry {
            uint16_t        flags;
            uint16_t        provider_no;
            uint32_t        provider_chunk;
    };
    
    #define VIRSTOR_MAP_ENTRY_SIZE (sizeof(struct virstor_map_entry))
    #define VIRSTOR_MAP_BLOCK_ENTRIES (maxphys / VIRSTOR_MAP_ENTRY_SIZE)
    /* Struct size is guarded by MPASS in main source */
    
    #ifdef _KERNEL
    
    #define LOG_MSG(lvl, ...) \
        _GEOM_DEBUG("GEOM_VIRSTOR", g_virstor_debug, (lvl), NULL, __VA_ARGS__)
    #define LOG_MESSAGE LOG_MSG
    
    #define LOG_REQ(lvl, bp, ...) \
        _GEOM_DEBUG("GEOM_VIRSTOR", g_virstor_debug, (lvl), (bp), __VA_ARGS__)
    #define LOG_REQUEST LOG_REQ
    
    /* "critical" system announcements (e.g. "geom is up") */
    #define LVL_ANNOUNCE    0
    /* errors */
    #define LVL_ERROR       1
    /* warnings */
    #define LVL_WARNING     2
    /* info, noncritical for system operation (user doesn't have to see it */
    #define LVL_INFO        5
    /* debug info */
    #define LVL_DEBUG       10
    /* more debug info */
    #define LVL_DEBUG2      12
    /* superfluous debug info (large volumes of data) */
    #define LVL_MOREDEBUG   15
    
    /* Component data */
    struct g_virstor_component {
            struct g_consumer       *gcons;
            struct g_virstor_softc  *sc;
            unsigned int             index;         /* Component index in array */
            unsigned int             chunk_count;
            unsigned int             chunk_next;
            unsigned int             chunk_reserved;
            unsigned int             flags;
    };
    
    /* Internal geom instance data */
    struct g_virstor_softc {
            struct g_geom           *geom;
            struct g_provider       *provider;
            struct g_virstor_component *components;
            u_int                    n_components;
            u_int                    curr_component; /* Component currently used */
            uint32_t                 id;            /* Unique ID of this geom */
            off_t                    virsize;       /* Total size of virstor */
            off_t                    sectorsize;
            size_t                   chunk_size;
            size_t                   chunk_count;   /* governs map_size */
            struct virstor_map_entry *map;
            size_t                   map_size;      /* (in bytes) */
            size_t                   map_sectors;   /* Size of map in sectors */
            size_t                   me_per_sector; /* # map entries in a sector */
            STAILQ_HEAD(, g_virstor_bio_q)   delayed_bio_q; /* Queue of delayed BIOs */
           struct mtx               delayed_bio_q_mtx;
   };
   
   /* "delayed BIOs" Queue element */
   struct g_virstor_bio_q {
           struct bio              *bio;
           STAILQ_ENTRY(g_virstor_bio_q) linkage;
   };
   
   #endif  /* _KERNEL */
   
   #endif  /* !_G_VIRSTOR_H_ */

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